The discovery of two massive holes punched through a stream of stars could help answer questions about the nature of dark matter, the mysterious substance holding galaxies together. Researchers have detected two massive holes which have been ‘punched' through a stream of stars just outside the Milky Way, and found that they were likely caused by clumps of dark matter, the invisible substance which holds galaxies together and makes up a quarter of all matter and energy in the universe.
The scientists, from the University of Cambridge, found the holes by studying the distribution of stars in the Milky Way. While the clumps of dark matter that likely made the holes are gigantic in comparison to our Solar System with a mass between one million and 100 million times that of the Sun they are actually the tiniest clumps of dark matter detected to date.
“While we do not yet understand what dark matter is formed of, we know that it is everywhere,” said Dr Denis Erkal from Cambridge's Institute of Astronomy, the paper's lead author. “It permeates the universe and acts as scaffolding around which astrophysical objects made of ordinary matter such as galaxies are assembled.”
The results, which have been submitted to the Monthly Notices of the Royal Astronomical Society, could help researchers understand the properties of dark matter, by inferring what type of particle this mysterious substance could be made of. According to their calculations and simulations, dark matter is likely made up of particles more massive and more sluggish than previously thought, although such a particle has yet to be discovered.
Current theory on how the universe was formed predicts that many of these dark matter building blocks have been left unused, and there are possibly tens of thousands of small clumps of dark matter swarming in and around the Milky Way. These small clumps, known as dark matter sub-haloes, are completely dark, and don't contain any stars, gas or dust.
Dark matter cannot be directly measured, and so its existence is usually inferred by the gravitational pull it exerts on other objects, such as by observing the movement of stars in a galaxy. But since sub-haloes don't contain any ordinary matter, researchers need to develop alternative techniques in order to observe them.
The technique the Cambridge researchers developed was to essentially look for giant holes punched through a stream of stars. These streams are the remnants of small satellites, either dwarf galaxies or globular clusters, which were once in orbit around our own galaxy, but the strong tidal forces of the Milky Way have torn them apart. The remnants of these former satellites are often stretched out into long and narrow tails of stars, known as stellar streams.
“Stellar streams are actually simple and fragile structures,” said co-author Dr Sergey Koposov. “The stars in a stellar stream closely follow one another since their orbits all started from the same place. But they don't actually feel each other's presence, and so the apparent coherence of the stream can be fractured if a massive body passes nearby. If a dark matter sub-halo passes through a stellar stream, the result will be a gap in the stream which is proportional to the mass of the body that created it.”
The researchers used data from the stellar streams in the Palomar 5 globular cluster to look for evidence of a sub-halo fly-by. Using a new modelling technique, they were able to observe the stream with greater precision than ever before. What they found was a pair of wrinkled tidal tails, with two gaps of different widths.
By running thousands of computer simulations, the researchers determined that the gaps were consistent with a fly-by of a dark matter sub-halo. If confirmed, these would be the smallest dark matter clumps detected to date.
“If dark matter can exist in clumps smaller than the smallest dwarf galaxy, then it also tells us something about the nature of the particles which dark matter is made of namely that it must be made of very massive particles,” said co-author Dr Vasily Belokurov. “This would be a breakthrough in our understanding of dark matter.”
The reason that researchers can make this connection is that the mass of the smallest clump of dark matter is closely linked to the mass of the yet unknown particle that dark matter is composed of. More precisely, the smaller the clumps of dark matter, the higher the mass of the particle.
Since we do not yet know what dark matter is made of, the simplest way to characterise the particles is to assign them a particular energy or mass. If the particles are very light, then they can move and disperse into very large clumps. But if the particles are very massive, then they can't move very fast, causing them to condense in the first instance into very small clumps.
“Mass is related to how fast these particles can move, and how fast they can move tells you about their size,” said Belokurov. “So that's why it's so interesting to detect very small clumps of dark matter, because it tells you that the dark matter particle itself must be very massive.”
“If our technique works as predicted, in the near future we will be able to use it to discover even smaller clumps of dark matter,” said Erkal. “It's like putting dark matter goggles on and seeing thousands of dark clumps each more massive than a million suns whizzing around.”
The Daily Galaxy via University of Cambridge
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The contract between ESA and Arianespace to launch the ADM-Aeolus satellite was signed on 22 July 2016 by ESA's Director of Earth Observation Programmes, Josef Aschbacher, (left) and CEO of Arianespace, Stéphane Israël, (right) in the presence of Jan Woerner, ESA Director General, (centre), at ESA headquarters in Paris, France. Aeolus will be launched on a Vega rocket from Europe's Spaceport near Kourou in French Guiana at the end of 2017. Using novel laser technology, this new mission will provide profiles of wind, aerosols and clouds to advance our understanding of atmospheric dynamics and to improve weather forecasts.
Read more: Vega to launch ESA's wind mission
Credit: ESANadia Imbert-Vier, 2016
“Alphabet” border, designed by William Wegman, distributed by A/D Gallery, New York, 1993.
Gift of A/D Gallery. 1997-108-1
William Wegman's 1993 “Alphabet” border is a charming representative of the vast body of children's wallpaper that has been around since the 19th century.
Wegman began photographing his Weimaraners in 1970, and his photographs became a favorite with adults and children alike. After all, what's not to like about a beautiful dog holding a goofy pose?
The border elevates Wegman's dogs from cute to educational by arranging them into letters of the alphabet from A to Z. It was available in white, blue and rust and each color was printed in a limited edition of 1,500, each signed and numbered by the artist.
The Cooper Hewitt, Smithsonian Design Museum contains children's wallpapers dating back to the 1870s. While early children's wallpaper was designed to be instructional, it didn't capture the whimsy exuded by this border, for which Wegman also designed a complementary sidewall paper.
Wegman started out as a painter, receiving degrees from the Massachusetts College of Art, Boston and the University of Illinois at Urbana-Champaign. In 1970, he moved to southern California to teach at California State College, Long Beach. That's when he purchased his Weimaraner, Man Ray, and began photographing him in unusual poses. This photography continued in 1986 with the addition of Fay Ray, another Weimaraner, and then with her offspring. Wegman has created numerous books for children and adults, and film and video for such companies as Saturday Night Live, Nickelodeon and Sesame Street.
The post Sit! Stay! Spell! appeared first on Smithsonian Insider.
Hungarian poster for ZABRISKIE POINT (Michelangelo Antonioni, USA, 1970)
Designer: Laszlo Lakner
Poster source: Film/Art Gallery
Visitors to the Hirshhorn plaza encounter “Still Life with Spirit and Xitle.” (Photo by John Barrat)
Although it has no magnetic properties, the 9-ton red volcanic boulder on the plaza of the Hirshhorn Museum and Sculpture Garden keeps pulling people in from the nearby sidewalk on Independence Avenue. Perhaps it is the boulder's painted-on smirk or the fact that it sits atop a 1992 Dodge Spirit, creating, as a recent press expounds: “a slapstick disaster scene… part performance, part sculpture.”
“Joyful and cathartic,” is how Hirshhorn Chief Curator Stéphane Aquin described the sculpture “Still Life with Spirit and Xitle” on a recent August morning as he watched person after person curiously approach and then examine the artwork. Many took selfies with the smashed car and rock.
“On a very simple level, people just see a rock on a car and they say, ‘God this is fantastic,' because they wouldn't dream of wanting to see that on their car,” Aquin says. “And then some would, because they hate their car.”
Created by expatriate American artist Jimmy Durham in 2007, the Hirshhorn recently acquired the sculpture following its appearance in the 2015 Art Basel exhibition in Miami Beach. “It was truly the star of the art fair,” Aquin recalls. “I don't know if it is a sign of the quality of a work, but definitely of its public appeal, it blew up on Instagram. It was really the most spectacular thing in the fair.”
Durham's name for the sculpture refers to the ancient Mexican volcano Xitle (shy-tuhl) which means, “Spirit.” It erupted around 245-315 AD and engulfed the then-prominent city of Cuicuilco in lava. Durham had a 9-ton boulder quarried from near the buried city which was then placed by crane upon the roof of the Dodge Spirit. As a finishing touch, Durham painted a smug, cartoon-like face on the boulder.
Still Life with Spirit and Xitle” on the Hirshhorn plaza (Photo by John Barrat)
“It's sort of an open metaphor of the revenge of nature over culture,” Aquin explains. “It represents the encounter of two forms of spirit, one ancient, mythological and physical and the other—a Dodge Spirit—a car produced in Mexico.
Durham, who had lived in Mexico between 1987 and 1994, was aware of other associations with the car, Aquin says. “Because it was a powerful car undercover police would use them, as well as drug dealers…so it has associations of shady, nefarious government force.”
Although the volcanic rock appears to have landed violently upon the car, Hirshhorn staff placed it gently down with a crane. The boulder's weight had already bent the car's frame, pushing it down to the ground. “There is no car that's going to take 9 tons,” Aquin says.
Its placement on the plaza in front of the Hirshhorn's main entrance is not arbitrary, Aquin adds. Car and rock sit atop the only concrete pillar that supports the plaza from below. “We had X-rays done to locate the plaza pillar and determine the exact position where we could safely place it,” Aquin explains. “Anywhere else and it may have dropped straight down,” into the Hirshhorn's basement.
A crew of Smithsonian staff use a crane to install Jimmy Durham's sculpture “Still Life with Spirit and Xitle” on the Hirshhorn Plaza.
After numerous walks around the museum while observing the constant flow of pedestrians in the vicinity, Aquin and other HMSG staff determined that a large percentage of the Hirshhorn's visitors travel to the museum from the Air and Space Museum and L'Enfant Plaza Metro, walking west along Independence Avenue. With this in mind, the Dodge is aimed at an angle with its headlights pointing at these walkers as they approach the Hirshhorn's south plaza entrance. The sculpture is “a show stopper,” Aquin says. “Everyone stops. It's just a simple thing but no one gets over it.”
How does one preserve a demolished car? “It's complicated,” Aquin observes. As per Durham's wishes the elements will be allowed to take their toll upon the car. “We know the car is going to dilapidate over time. In 60 years it will be totally different and down the line it will disappear. Durham suggested at some point we replace the car with a typical Washington, D.C. diplomatic limousine…something like a Cadillac Escalade, a motorcade car,” Aquin says. “But if we do that then the question arises what do we do about the sculpture's title? We lose the Dodge Spirit.”
For the rock, geologists and volcanologists have been invited to assess the cracks in the rock and, as a few plants have grown on its top, a botanist also is being consulted.
“Still Life with Spirit and Xitle,” signals a new direction for the Hirshhorn more than anything else, Aquin says. “It's only one work but it has transformed the plaza and the whole look of the building. Little by little that's what we are trying to do.”
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To commemorate the opening of the Smithsonian's National Museum of African American History and Culture three new books have been released by Smithsonian Books: Dream a World Anew: The African American Experience and the Shaping of America; Begin with the Past: Building the National Museum of African American History and Culture; and National Museum of African American History and Culture: A Souvenir Book. Each book will be available in the museum store beginning with the museum's opening on Sept. 24. On Sept. 27 the books will be widely available elsewhere.
Dream a World Anew: The African American Experience and the Shaping of America uses objects and stories from the museum to examine the African American experience. It presents a sweeping history that includes the path from slavery to freedom, the struggle during Reconstruction and the civil rights movement, and the swell of major social, political and economic changes since 1968. The book also celebrates the achievements of extraordinary black musicians, writers, performers, athletes and artists who influenced American cultural identity.
Begin with the Past: Building the National Museum of African American History and Culture presents the long history of efforts to build a permanent place to collect, study and present African American history and culture. It traces the appointment of the director, the selection of the site and the process of conceiving, designing and constructing a public monument to the achievements and contributions of African Americans.
National Museum of African American History and Culture: A Souvenir Book showcases the treasures of the museum's collections. Highlights include a silk lace-and-linen shawl given to Harriet Tubman by Queen Victoria, Pullman Porter train cars and uniforms, the jacket and skirt worn by Marian Anderson for her 1939 Lincoln Memorial concert, Negro League baseball banners and jerseys, a Tuskegee Airman flight jacket and Chuck Berry's Cadillac. All of these objects and many more are accompanied by captions explaining their significance and role in the nation's history.
The post Three New books mark museum opening appeared first on Smithsonian Insider.
Supple Studio has designed an identity system for D.R.A.W Recruitment using an interlocking “D' device and the strapline “The Art of the Perfect Fit”.
The new company was formed from the merger of Drummond Read Recruitment and Art//Work and specialises in sourcing talent from the fine arts, antiques and luxury markets.
Supple creative director Jamie Ellul, who was invited to tender, says: “The client had already spotted that their existing company names formed the acronym D.R.A.W; it felt like a gift of a name with a genuine back story.
“But we wanted to avoid the obvious solution of drawing things or sketching, so we took the angle of people being ‘drawn together' which led to ‘the perfect fit'.”
An interlocking D monogram was also created and Ellul says he “worked with the client to choose a range of materials that got across D.R.A.W.'s diverse client base and candidates from classic to contemporary.”
The main points of interaction for service users are the website and jobs board. Ellul, who also worked on these, says: “We've kept the design very classic using black and white throughout, with the only ping of colour being the monogram logos.
We were conscious of the fact it's a very discerning audience, so a neutral classic approach seemed to make sense. The typeface we've used is Value by Colophon, which lends a little quirkiness to the design, but still feels in keeping with the classic feel.”
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Rebecca Kirrane has joined Decibel Digital as a UX/UI designer, moving from commerce consultancy, Salmon.
Bentley has appointed John Paul Gregory to lead its exterior design division. Gregory's first production car is likely to be the new Bentley Continental GT.
Manchester-based studio Code Computerlove has announced the appointment of Amy Robinson as customer experience consultant. The role will see Robinson help bolster the studio's content, acquisition and conversion teams.
CloudTag has appointed Peter Griffith as chief creative officer to oversee the design, aesthetics and brand messaging of Cloudtag products. Griffith was formerly head of mobile phones design at Microsoft.
Jaywing has announced its acquisition of Leeds-based consultancy, Bloom. The consultancy hopes to grow the development and distribution of its data science-led products.
A new consultancy has been launched after the founder of Sumo Design, Jim Richardson, closed the business to focus on a new start-up. The creative team behind Sumo Sarah Tempest and Michael Sutton have launched their own consultancy in Newcastle, called Altogether.
Contact aimee.mclaughlin@centaurmedia.com if there have been any moves and changes in your consultancy.
The post Moves & changes industry news appeared first on Design Week.
Design Bridge and Diageo have worked together on the new packaging design for Gordon's gin, almost 15 years after the consultancy previously redesigned the gin brand's bottle.
Design Bridge's brief was to respond to the huge boom in interest in gin over the last few years, and “reassert Gordon's position as the top selling gin brand”, according to chief creative officer at Design Bridge, Graham Shearsby.
“We saw it as an opportunity to guide the packaging onto the next part of its journey,” says Shearsby. “It's always been quite a functional bottle, part of what we tried to do was bring more life to it.”
The new bottle is slightly slimmer and taller than previously, while the label has been applied to the D-shaped curved side of the bottle instead of the flat side like before.
“It was to get a bit more movement across the front label,” says Shearsby. “The bottle was a little bit too flat on the front, so this way it projects itself and will stand out on the shelf.”
Inspired by a trip to the brand's archives, which revealed an old advertising campaign with the tagline “the heart of a good cocktail”, along with heart-shaped labels from 1920s bottles, the heart symbol has become the focal point of the new design.
The glass bottle itself has a heart shape with “botanical flourishes” embossed onto it, encircling the words “Estd. London 1769”.
Meanwhile, the Gordon's wordmark on the label has been redrawn by hand, and the brand's original boar logo has been made more visible, moving from the bottom to the front of the bottle.
The new design has also been introduced to Gordon's collection of flavoured gins, sloe, elderflower and cucumber, and to Gordon's Export gin. The newly designed packaging will roll out globally this month.
The post Gordon's gin reveals new packaging design appeared first on Design Week.
Ragged Edge has redesigned the visual identity for food blogger Ella Mills, commonly known as Deliciously Ella.
The rebrand includes a new design system and updated logo shared with health food restaurant Mae Deli, co-founded by Mills and her husband as well as the packaging for the blogger's first retail product, Deliciously Ella's Energy Balls.
Based on Mills' own signature, the logo features a hand drawn typeface and a “sunburst” shape that seeks to “reinforce her personal connection with her followers”, according to Ragged Edge.
The consultancy chose a hand drawn typeface Naive Line Sans for headlines and the monospaced Elementa Regular for body copy. Ragged Edge cofounder Max Ottignon says: “Used together, these feel approachable, warm and human.”
Meanwhile, the packaging for the energy balls has been designed to reflect Mills' three core values: “natural, simple and honest”. It combines bright colours designed to make it stand out on the shelf compared to other similar products and comes in a matte texture.
Ottignon says: “Much of Ella's popularity stems from her open and honest relationship with her followers. Maintaining that level of trust as her brand grows into new areas was crucial.”
“Our strategy set out to build on her core values and create a beautifully crafted design, with substance and weight.”
The Deliciously Ella Energy Balls launched at Whole Foods this month and will also be rolled out to selected supermarkets.
The post Ragged Edge refreshes Deliciously Ella branding appeared first on Design Week.
Consultancy Pearlfisher has created the visual identity and packaging for a new tampon brand which looks to empower women in China.
Fémme is a new product from Chinese company Yoai, which aims to increase the presence of and education about tampons in China, and change a “patronising” tone around tampons to associations with “confidence and positivity”.
Recent research found that only 2% of women in China use tampons, with the majority citing the reason as inexperience with the product.
The new brand aims to shift shake conservative, traditional associations with feminine hygiene care in China, says Pearlfisher creative director Natalie Chung, through a “stylish and discreet” design.
The logo is composed of a Chinese character symbolising womanhood encased with a circle, within a circle, all created in a “bold” red to symbolise menstruation.
A simple, sans-serif wordmark has been used, which aims to “elevate the product from basic pharmacy to high-end premium”, says Chung.
The packaging also aims to be “elegant” through embossing, the use of a foil logo and card inserts of line-drawn female forms which replicate Chinese characters.
Packs use a pastel colour scheme of blue, pink and green to indicate different product sizes, and there is educational information included on the back which aims to “dispel cultural misconceptions” and teach women how to use tampons.
Victoria Li at Yoai says the new brand identity is “based on a modern interpretation of Chinese values” rather than something “overtly westernised”, and hopes the product will help to “liberate” and offer more choice to women in China.
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A 120m long wooden replica of 1666 London was floated down the River Thames between Waterloo Bridge and Blackfriars Bridge at sunset before it was set ablaze to mark 350 years since the Great Fire.
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By Rebecca Wolff, National Geographic Young Explorer Grantee
I hadn't grasped the true human consequences of oil spills until we immersed ourselves in the situation going on in Peru.
The stories our team heard of lingering illness and food insecurity were heartbreaking. “When the oil spill happened, [the doctors] arrived in the community and gave out a few medicines, and then they never came back. Things shouldn't be like this,” we were told.
By June 2016, 8000 individuals and at least 30 indigenous communities were affected. I never thought it could possibly get worse.
On August 10, the fourth oil spill since the start of 2016 was reported in the Peruvian Amazon.
At least 10 indigenous communities are impacted by the newest spill in the province of Condorcanqui, department of Amazonas. More than 20 similar spills have crippled the region over the past five years.
This latest spill has the potential to impact the Marañon River and the indigenous groups living there, including the Awajún who were affected by the January 25 spill in Chiriaco and the June 24 spill in Barranca. The Marañon is one of the most important rivers in Peru, starting in the Andes and eventually becoming a major tributary of the Amazon River.
Anger and frustration are reaching all-time highs across Peru. In February, after two spills saw over 3,000 barrels of crude oil flow into the Chiriaco and Morona Rivers, state-owned oil company Petroperú was told to cease pumping oil on their Nor Peruano pipeline. The 40-year-old pipeline is in a state of disrepair, the believed cause of the multiple spills this year.
A third oil spill in late June raised questions as to whether Petroperú had followed state orders to stop pumping oil and indicated the company had in fact been continuing to operate their faulty pipeline. One week after the June 24 spill, the Peruvian Supervisory Agency for Investment in Energy and Mining sanctioned Petroperú for pumping oil without permission. The company's president resigned during the controversy.
The cause of the newest spill has not been verified. The Agency for Environmental Assessment and Enforcement (OEFA) released a statement on August 11 saying the spill may have resulted from an intentional cut to the pipeline. However, advocates I work with in Peru feel that unconfirmed accusations like this only help shift the blame and responsibility for the spill away from Petroperú. It also remains unclear whether Petroperú ever received permission, after the June sanction, to pump oil again. People are demanding to know if Petroperú was operating illegally, once again putting the Amazon at risk.
Communities and indigenous organizations are often the first to report oil spills on their territories, yet they are not seeing swift legal action or recognition of their rights and needs in wake of these environmental disasters.
“Legal processes are often partial and incomplete. There is a major disconnect between the process and the expectations of affected communities,” anthropologist Rodrigo Lazo, one of our Peruvian collaborators told me. In the Amazon, many individuals simply feel that not enough is being done to help.
For the past six months, my team and I have interviewed lawyers, community members, indigenous leaders, and advocates across Peru. The testimonies of those afflicted by the spills and those fighting on behalf of communities never waver. Oil spills have abruptly impacted livelihoods and health while polluting the land and rivers of the Amazon.
One mother worried about how she would feed her children when her farmland remained covered in oil, never cleaned up by Petroperú. A community leader explained the health and emergency food supplies provided in his area were not enough for the vast amount of people seeking support.
The number of oil spills occurring in the Peruvian Amazon is increasing at an alarming rate. As we wait to learn just how bad this fourth spill will be, I wonder about the countless stories never told of how oil spills impact human lives. I can only hope the inspiring indigenous leaders, communities, and organizations our team has met will keep fighting to make sure that a fair legal and social resolution is achieved for all those stricken by these tragic oil spills.
More by Rebecca Wolff and Team Member Kevin Floerke
Indigenous Amazonians Reeling From Oil Spills in the Jungle
Health Concerns, Food Insecurity Linger Months After Peruvian Oil Spills
Peru's Oil Spills Deserve the World's Attention
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Somewhat exhausted view of Big Ben and Westminster Bridge - but couldn't resist as the sun was setting. Now for some less touristy shots I think...
The Space Shuttle Challenger rises through the skies above Florida on February 3, 1984.
With the first release of my book tomorrow in the United Kingdom, I have been doing a lot of thinking about why I started this project in the first place. To sum it up in one word, it has always been about perspective. Through space travel or satellites or simply bringing ourselves to a more elevated viewpoint, we can discover new ways to see our world like never before. I think that exercise can be healthy, it can be challenging, and ultimately, it can be beautiful. For me, it has been such an amazing adventure to work on this project and this book and I can't wait to see where it will take us next. Photo courtesy of NASA
In recent years, triple-digit inflation, massive food shortages, rising crime rates, and failing public services in Venezuela have forced many families into difficult decisions. The lack of available and affordable food has led to an increasing number of pets being dropped off at shelters, or simply abandoned in the streets. The Associated Press reports that “Pet owners say the price of dog food has more than doubled in recent months to $2 a pound, more than a day's pay for those earning the minimum wage.” Reuters photographer Carlos Garcia Rawlins and AP photographer Fernando Llano recently documented the growing number of abandoned dogs and cats in Venezuela's parks, shelters, and private clinics.
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Kenyan conservationist Paula Kahumbu leads a new generation of Africans who are taking control of their environmental future
In the cool and serene area of Karen, near Nairobi, in the offices of the conservation organisation she has built, Paula Kahumbu eats chicken and rice and talks about a revolution.
Related: Why the Guardian is spending a year reporting on the plight of elephants
The results of the wars we in conservation fight and win are not instant. They will be felt by generations to come
Continue reading...Look carefully at the most uppermost branches upon the great family tree of life on Earth, and near the top you will see a tiny twig labelled “panda”. It is re-growing. Slowly, it is getting sturdier.
Pandas are doing better than they were. In fact, this week, they have been officially downgraded in their conservation status from “endangered” to “vulnerable”, in the International Union for Conservation of Nature's latest “red list” update. The IUCN's annual announcement details the survival fortunes of every leaf upon life's great tree. It is nature's version of the FTSE 100, turned on its head.
Where was coverage of the nubian flapshell turtle?
Related: Eastern gorilla now critically endangered while giant panda situation improves
Continue reading...-- This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website.
Has the social media site been good for our mental health or not? The evidence isn't straightforward, researchers say, despite lots of study. How Facebook makes you feel may depend on how you use it.
In 1954, Brown v. Board of Education declared that separate schools for black students and white students should be dismantled with “all deliberate speed.” However, in recent decades, schools have re-segregated to the levels they were just after Brown. In this video, Atlantic education editor Alia Wong speaks to the U.S. Secretary of Education John King, Jr. about his new plan to integrate schools. King's policy changes will expand a system known as “school choice” that permits students to go to schools outside their neighborhoods and theoretically allows parents to voluntarily integrate schools. But, D.C. parent Natalie Hopkinson argues that schools will continue to re-segregate if the federal government does not intervene more forcefully. “As long as we rely on [parental] choice, we will continue to have the same result,” she says. “White parents will not send their kids to schools unless they are already white.”
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Finger trouble with onboard navigation systems led to an Air Asia flight making a two-hour internal hop in Australia before its scheduled journey to Malaysia.…
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London. July 2016.
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Ferdinand Hayden Scientist of the Day
Ferdinand Vandeveer Hayden, an American geologist, was born Sep. 7, 1829.
Another of the world's grand tech exhibitions is now in the books, with Berlin hosting what might have been its most varied and intriguing IFA in years. Like other shows, this one had its oddities, such as LG's fridge running Windows 10, but what stood out to me was the practicality and immediate emotional appeal of many of the new products on show. With modern technology now mainstream and reaching a plateau of good-enough hardware, companies are spending less time chasing and explaining new specs and more of their effort on humanizing and styling out their latest gear.
This is not a criticism. I think there's a great deal of substance in style. It is the substance of design.
Lenovo was the consensus winner of IFA 2016 with its...
The ocean conservation society last week completed its first-ever expedition to document the richness of habitats and threats to marine life in waters off the Netherlands, UK, Norway and Denmark. The results from the two-month, at-sea study will be used to strengthen marine protection in the region
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The south bank of the river Thames in London, England taken at sunset
Researchers find that one reason some people cheat over and over again is because we all tend to suffer from "unethical amnesia" — our minds are prone to forgetting the bad stuff we've done.
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Scientists have demonstrated a method for making 3-D images of structures in biological material under natural conditions at a much higher resolution than other existing methods. The method may help shed light on how cells communicate with one another and provide important insights for engineers working to develop artificial organs such as skin or heart tissue.
Image credit: Jenna Luecke, UT Austin
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In this image, gold nanorods, embedded in a cell-populated collagen gel, scatter light as viewed under a darkfield microscope. The collective excitation of electrons in the conduction band of gold nanoparticles arising from resonance with incident-visible radiation is referred to as localized surface plasmon resonance. This excitation leads to resonant Rayleigh light scattering. Because of this strong scattering, individual nanoparticles, much smaller than the wavelength of light, can be observed using an optical microscope. There has been considerable interest in resonant Rayleigh scattering from gold and silver nanoparticles for biological and chemical analysis. In this application, a fibroblast-seeded collagen gel, an in vitro material system often used to model wound healing, is embedded with nanoparticles. The pattern of scattered light will be tracked using computerized pattern matching and image correlation techniques to measure the deformation that occurs as the collagen gel contracts, in a simulation of the formation of scar tissue. It is hoped that these small scale measurements will illustrate local heterogeneity in the mechanical response of the material.
Image credit: The USC Nanocenter
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The sun goes down on a neon aeon. Pre-lunar Londinivm from Greenwhich park.
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Short-tailed ichneumon wasp (Ophion sp.) collected in Forillon National Park, Quebec, Canada, and photographed at the Centre for Biodiversity Genomics (sample ID: BIOUG11178-E05; specimen record: http://www.boldsystems.org/index.php/Public_RecordView?processid=CNFNQ737-14)
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Two separate experiments at the Large Hadron Collider at the European Organisation for Nuclear Research, on the French-Swiss border, appear to confirm the existence of a subatomic particle, the Madala boson, that for the first time could shed light on one of the great mysteries of the universe - dark matter.
The Madala boson follows the discovery of the Higgs boson in 2012 "but the particles differ remarkably," said the team leader Bruce Mellado of South Africa's Witwatersrand University School of Physics. The Madala boson is heavier and disintegrates into the Higgs boson. "The Higgs boson in the Standard Model of physics is not able to explain several things, such as dark matter," Mellado added.
"The Madala boson is important for our understanding of the universe. Through this we can communicate with dark matter - we don't have an object that can do that. This could be the first," said Mellado. The boson appears to interact with energy that cannot be explained.
Mellado will summarize the reappearance of these features in the features in the proton-proton collision data collected during Run I by the ATLAS and CMS experiments at the Large Hadron Collider that were used to formulate the Madala hypothesis, and its implications.
These features in the data were interpreted as being due to the existence of a new scalar, the Madala boson, with a mass around 270 GeV. A conservative statistical combination yielded a three sigma effect. The ATLAS and CMS collaboration have just released new data at the international conference ICHEP2016.
In particular, Mellado will discuss a prediction, namely of the production of anomalously large 4 W bosons, leading to a striking and unequivocal signature.
Dark matter is the new frontier in physics, Mellado said, and scientists were racing to work out what it is. The Chinese and Japanese had declared intentions of building colliders that could be used to search for the identity of dark matter and dark energy. A team of 35 University of the Witwatersrand scientists today hosts a series of seminars about the Madala boson (Zulu for "old"), followed by other seminars in the US, UK, China and India.
The Daily Galaxy via wits.ac.za
Image credit: CERN
europeanspaceagency posted a photo:
This week one year ago, ESA astronaut Andreas Mogensen (left) spent 10 days in space on his ‘iriss' mission to the International Space Station. He was launched on 2 September 2015 in a Soyuz spacecraft with cosmonaut commander Sergei Volkov (right) and returned in a different Soyuz with commander Gennadi Padalka. Sergei stayed on to complete his third six-month stay on the Space Station.
Andreas and Sergei unveiled a bust of Yuri Gagarin, the first human in space, exactly a year after their own launch. The event commemorated Gagarin's visit to Denmark 54 years ago during his tour of Europe after his landmark orbit of Earth on 12 April 1961.
The bust is at the Danish Technical University near Copenhagen, Denmark. The university participated in a number of experiments on the International Space Station, including Andreas imaging a newly discovered weather phenomenon.
Credit: DTUM. Schlosser
China is accelerating efforts to design and build a manned deep-sea platform to help it hunt for minerals in the South China Sea, one that may also serve a military purpose in the disputed waters, joining an exclusive club of countries that are capable of achieving human access to the deep sea. The other countries are the United States, Russia, France and Japan. The achievement will allow China to explore more than 99.8% of the ocean floor, Liu Cigui, director China's State Oceanic Administration (SOA), told the media.
China is accelerating efforts to design and build an oceanic “space station” would be located as much as 3,000 meters (9,800 feet) below the surface of the South China Sea, according to a recent Science Ministry presentation viewed by Bloomberg.
The project was mentioned in China's current five-year economic plan released in March and ranked number two on a list of the top 100 science and technology priorities.
"Having this kind of long-term inhabited station has not been attempted this deep, but it is certainly possible," said Bryan Clark, a senior fellow at the Washington-based Center for Strategic and Budgetary Assessments. "Manned submersibles have gone to those depths for almost 50 years. The challenge is operating it for months at a time."
The U.S. Energy Information Administration says the South China Sea has proved and probable reserves of about 11 billion barrels of oil and 190 trillion cubic feet of natural gas. China Cnooc chairman estimated the South China Sea holds around 125 billion barrels of oil and 500 trillion cubic feet of natural gas.
Modern nuclear attack submarines like the American Seawolf class are estimated to have a test depth of 490 m (1,600 ft), which would imply a collapse depth of 730 m (2,400 ft). Test depth is the maximum depth at which a submarine is permitted to operate under normal peacetime circumstances, and is tested during sea trials.
In June 2012, China's manned submersible Jiaolong successfully completed its deepest test dive, to 7,020 meters in the Mariana Trench in the western Pacific Ocean.
Researchers at Shanghai Ocean University have also developed a submersible movable laboratory capable of operating at more than 13,000 feet underwater.
Deepsea challenger has gone to the bottom of the ocean On March 26, 2012, James Cameron reached the bottom of the Challenger Deep, the deepest part of the Mariana Trench. The maximum depth recorded during this record-setting dive was 10,908 meters (35,787 ft).
Nearly 50% of the world's oceans are deeper than 4 kilometers, which provides vast areas for concealment and storage. Concealment provided by the sea also provides the opportunity to quickly engage remote assets that may have been dormant and undetected for long periods of time, while its vastness allows simultaneous operation across great distances.
The Daily Galaxy via Bloomberg, Nextbigfuture, China Shipbuilding Industry Corporation, DARPA
Scientists are speculating that virtually all of Earth's life-giving carbon could have come from a collision about 4.4 billion years ago between Earth and an embryonic planet similar to Mercury, approximately 100 million years after Earth formed.
In a new study this week in Nature Geoscience, Rice petrologist Rajdeep Dasgupta and colleagues offer a new answer to a long-debated geological question: How did carbon-based life develop on Earth, given that most of the planet's carbon should have either boiled away in the planet's earliest days or become locked in Earth's core?
“The challenge is to explain the origin of the volatile elements like carbon that remain outside the core in the mantle portion of our planet,” said Dasgupta, who co-authored the study with lead author and Rice postdoctoral researcher Yuan Li, Rice research scientist Kyusei Tsuno and Woods Hole Oceanographic Institute colleagues Brian Monteleone and Nobumichi Shimizu.
Dasgupta's lab specializes in recreating the high-pressure and high-temperature conditions that exist deep inside Earth and other rocky planets. His team squeezes rocks in hydraulic presses that can simulate conditions about 250 miles below Earth's surface or at the core-mantle boundary of smaller planets like Mercury.
“Even before this paper, we had published several studies that showed that even if carbon did not vaporize into space when the planet was largely molten, it would end up in the metallic core of our planet, because the iron-rich alloys there have a strong affinity for carbon,” Dasgupta said.
Earth's core, which is mostly iron, makes up about one-third of the planet's mass. Earth's silicate mantle accounts for the other two-thirds and extends more than 1,500 miles below Earth's surface. Earth's crust and atmosphere are so thin that they account for less than 1 percent of the planet's mass. The mantle, atmosphere and crust constantly exchange elements, including the volatile elements needed for life.
If Earth's initial allotment of carbon boiled away into space or got stuck in the core, where did the carbon in the mantle and biosphere come from?
“One popular idea has been that volatile elements like carbon, sulfur, nitrogen and hydrogen were added after Earth's core finished forming,” said Li, who is now a staff scientist at Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. “Any of those elements that fell to Earth in meteorites and comets more than about 100 million years after the solar system formed could have avoided the intense heat of the magma ocean that covered Earth up to that point.
“The problem with that idea is that while it can account for the abundance of many of these elements, there are no known meteorites that would produce the ratio of volatile elements in the silicate portion of our planet,” Li said.
In late 2013, Dasgupta's team began thinking about unconventional ways to address the issue of volatiles and core composition, and they decided to conduct experiments to gauge how sulfur or silicon might alter the affinity of iron for carbon. The idea didn't come from Earth studies, but from some of Earth's planetary neighbors.
“We thought we definitely needed to break away from the conventional core composition of just iron and nickel and carbon,” Dasgupta recalled. “So we began exploring very sulfur-rich and silicon-rich alloys, in part because the core of Mars is thought to be sulfur-rich and the core of Mercury is thought to be relatively silicon-rich.
schematic of proto Earth's merger with a Mercury-like planetary embryo
A schematic depiction of proto Earth's merger with a potentially Mercury-like planetary embryo, a scenario supported by new high pressure-temperature experiments at Rice University.
Magma ocean processes could lead planetary embryos to develop silicon- or sulfur-rich metallic cores and carbon-rich outer layers. If Earth merged with such a planet early in its history, it could explain how Earth acquired its carbon and sulfur.
“It was a compositional spectrum that seemed relevant, if not for our own planet, then definitely in the scheme of all the terrestrial planetary bodies that we have in our solar system,” he said.
The experiments revealed that carbon could be excluded from the core — and relegated to the silicate mantle — if the iron alloys in the core were rich in either silicon or sulfur.
“The key data revealed how the partitioning of carbon between the metallic and silicate portions of terrestrial planets varies as a function of the variables like temperature, pressure and sulfur or silicon content,” Li said.
The team mapped out the relative concentrations of carbon that would arise under various levels of sulfur and silicon enrichment, and the researchers compared those concentrations to the known volatiles in Earth's silicate mantle.
“One scenario that explains the carbon-to-sulfur ratio and carbon abundance is that an embryonic planet like Mercury, which had already formed a silicon-rich core, collided with and was absorbed by Earth,” Dasgupta said. “Because it's a massive body, the dynamics could work in a way that the core of that planet would go directly to the core of our planet, and the carbon-rich mantle would mix with Earth's mantle.
“In this paper, we focused on carbon and sulfur,” he said. “Much more work will need to be done to reconcile all of the volatile elements, but at least in terms of the carbon-sulfur abundances and the carbon-sulfur ratio, we find this scenario could explain Earth's present carbon and sulfur budgets.”
The research was supported by NASA and the National Science Foundation.
The Daily Galaxy via Rice University
“Actually, it's quite possible that the planet has already been in some way imaged,” says Scott Sheppard of the Carnegie Institute. “That happened with Uranus, Neptune and Pluto — they were observed but not understood before they were actually detected. Who knows, proof of Planet X {or Planet 9} may already exist in some observatory archive.”
Scott Shepard's team has been se arching for proof of Planet 9 using the Dark Energy Camera on the 4-meter Blanco telescope at the Cerro Tollolo Inter-American Observatory in the southern Atacama region of Chile (below) . They have also collected data on distant solar system objects with the Japanese Hyper Surpime Camera on the 8-meter Subaru telescope in Hawaii. (National Optical Astronomical Observatory)
Shepard is considering an alternative theory that involves a Planet 9 exoplanet that had been been kicked out of another nearby solar system that formed in the general vicinity of ours. Such things are known to happen.
“If this turned out to be the case, then we'd know that there were other suns being formed nearby our sun,” Shepard said. “It would have to be a very dense solar environment, and that would also tell us a lot about the formation of our solar system.”
Object V774104 shown at the top of the page was discovered in late October, 2015, and is one of the most distant objects ever detected in the solar system. It appears to be about half the size of Pluto, but with an orbit two to three times wider than Pluto's. (Scott Sheppard, Chad Trujillo and Dave Tholen: Subaru Telescope)
Sheppard's team is conducting the deepest survey so far for objects beyond Neptune and the Kuiper Belt, a circumstellar disk that lies some 30 to 50 times as far as the Earth is from the sun. It is filled with dwarf planets asteroids, comets, and balls of frozen compounds — remnants of the earliest days of the evolution of the solar system. The Kuiper Belt is the region that includes Pluto, the now dwarf planet demoted with heated debate several years ago.
The team has observed nearly 10 percent of the sky using some of the largest and most advanced telescopes and cameras in the world. As they find and confirm these distant and faint objects, they analyze whether their discoveries fit into the larger theories about how interactions with a massive distant planet could have shaped the outer Solar System.
“Right now we are dealing with very low-number statistics, so we don't really understand what is happening in the outer Solar System,” Sheppard said. “Greater numbers of extreme trans-Neptunian objects must be found to fully determine the structure of our outer Solar System.”
He said that although astronomers believe there are thousands of these small objects, only about 15 have been positively identified. One discovered by Sheppard and Trujillo in 2014 — designated 2012 VP113 but nicknamed “Biden” — has the most distant known orbit in our solar system.
At the same time, Sheppard and Trujillo noticed that the handful of known extreme trans-Neptunian objects all clustered together and moved at similar orbital angles. These unusual dynamics lead the astronomers to propose that a substantial planet might be shepherding the smaller objects through its gravitational pull.
The search for Planet 9 is not the first to use the orbits of other bodies as a signpost to another planet. Indeed, Sheppard said that “we are now in a similar situation as in the mid-19th century when Alexis Bouvard noticed Uranus' orbital motion was peculiar, which eventually led to the discovery of Neptune.”
The other team most deeply involved with the Planet 9 hunt is led by Mike Brown and Konstantin Batygin of the California Institute of Technology. They are the ones who made a big splash earlier this year with their predictions of a Planet 9, again based on the orbits of smaller objects.
In an email, we said that the newly detected object “fit perfectly into our Planet 9 hypothesis, so we remain pretty confident that the planet we predicted is indeed the right planet.”
Other groups searching the trans-Neptunian region for planets and information about the early solar system include the Canadian Outer Solar System Origins Survey and the international Dark Energy Survey.
Sheppard said that while the teams searching for Planet 9 are definitely in competition — a discovery would, after all, re-write the textbooks — they are also cooperating in terms of reporting back to each other if a region of the sky they study comes up with nothing to report. That way, he said, the teams won't duplicate efforts where there is no promise of reward.
While Sheppard's and Brown's teams have the advantage of access to more sophisticated instruments to work with, it is certainly possible that one of the others will make breakthroughs, and possibly THE breakthrough.
The Daily Galaxy via NASA and Marc Kaufmann
Mysterious alien signals from a star system 94 light years from Earth picked up by Russian scientists last year did not come from an advanced extraterrestrial civilization, but from an old Soviet military satellite, says Russian news agency TASS, much to the disappointment of astronomers and alien enthusiasts across the world. But was it?
However, significant number of people around our globe are not convinced by TASS' version, believing it is one of the many cover ups aimed at deceiving us regarding the existence of advanced alien life from beyond our Solar System. They question Russia's motives for the denial of the signals validity --you'll have to draw your own conclusions.
The Russian scientists who originally intercepted the enigmatic signals, said they believed that they came from a cluster of stars ninety-four light years away in the Hercules constellation. The signals' frequency and power suggested there was a good chance they were messages from smart extraterrestrials. Excitement in the scientific community suddenly spiked.
Scientists say that HD 164595 has a Neptune-sized planet that is about seventeen times the mass of Earth. Seth Shostak, Senior Astronomer at the SETI Institute in California, says its orbit is too tight it is too close to its sun for life as we know it to exist.
“We, indeed, discovered an unusual signal," said Alexander Ipatov, who works at the Russian Academy of Sciences in an interview with TASS. "However, an additional check showed that it was emanating from a Soviet military satellite, which had not been entered into any of the catalogs of celestial bodies. It can be said with confidence that no sought-for signal has been detected yet.”
On August 29th, we reported that an international team of astronomers detected signals coming from almost 100 light years away, that appeared to be a strong candidate for extraterrestrial contact, according to a document circulated by Alexander Panov, a theorectical physicist at Lomonosov Moscow State University --"a strong signal in the direction of HD164595, a planet system in the constellation Hercules was detected on May 15, using the RATAN-600 radio telescope (above) in the Russian Republic of Karachay-Cherkessia."
Subsequently, Eric Korpela, an astronomer with Berkeley SETI, downplayed the hype over this latest signal in a note reported by VOX on the Berkeley SETI website. "All in all, it's relatively uninteresting from a SETI standpoint." Korpela continued:
"I looked over the presentation. I was unimpressed. In one out of 39 scans that passed over star showed a signal at about 4.5 times the mean noise power with a profile somewhat like the beam profile. Of course SETI@home has seen millions of potential signals with similar characteristics, but it takes more than that to make a good candidate. Multiple detections are a minimum criterio
"Because the receivers used were making broad band measurements, there's really nothing about this "signal" that would distinguish it from a natural radio transient (stellar flare, active galactic nucleus, microlensing of a background source, etc.) There's also nothing that could distinguish it from a satellite passing through the telescope field of view. All in all, it's relatively uninteresting from a SETI standpoint."
"If the transient claimed originates from beyond the Earth, then, given what we currently know of the parameters of the RATAN search, such events ought to be common. The fact that they are not frequently seen in continuum imaging surveys suggests that the RATAN transient is likely due to instrumental interference or to some other artifact of human technology. While absence of evidence for extraterrestrial intelligence is by no means evidence of absence, our GBT observations did not detect ongoing emission from the direction of HD 164595 between9.1 and 11.6 GHz to a sensitivity of ∼ 10 mJy (10σ).
"Single-epoch transients are by their nature hard to confirm ordeny, illustrating the need for confirming followup, either at a later time, or as part of the observing strategy (whether triggered follow-up of interesting sources, or some form of onoff observing). We intend to re-observe HD 164595 as part of the Breakthrough Listen target list, along with ongoing observations of targets selected using a range of criteria."
The Berkeley SETI team concluded that they "welcome opportunities for partnership in order to quickly validate and analyze candidate signals, to continue to develop tools and techniques, and to share our excitement with those who, like us, seek to answer the question, “Are we alone?”.
The next iPhone, expected to be unveiled Wednesday, may be missing something familiar: the ubiquitous headphone jack. Usability experts say the change could really sit badly with Apple customers.
Pretoria High School for Girls has long banned certain hairstyles so that students would have a "neat" appearance. Now black students are pushing back.
On September 12, NPR launches a new podcast, How I Built This, hosted by Guy Raz. The show features innovators, entrepreneurs, idealists, and the stories behind the movements they built.
Productivity, a key measure of the economy's health, has been growing more slowly in recent years. Can Facebook and other social media distractions on the job be partly to blame?
The lander was the first to ever set down on a comet — but couldn't get enough sunlight to recharge its batteries, and went into hibernation. New images show Philae stuck in a crack.
More than any of today's icons — Bill Gates, Steve Jobs, Mark Zuckerberg and the rest — Guglielmo Marconi was uniquely at the center of the communication revolution of his time, says Marc Raboy.
Alex Longo hopes to be the first person to walk on Mars. In the meantime, the Raleigh, N.C., sophomore has suggested a landing site for the next rover mission. His pick is one of four finalists.
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clayjon61 posted a photo:
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Alex Chilli posted a photo:
After some camera downtime following the U.S. , some nice light at the end of August forced me to pick it up again - as the sun goes down - trying to avoid the more obvious shot of St Paul's the light falling on the people looked great.
Mathias Appel posted a photo:
The elders say that reburying can help deal with the loss and hurt of disturbing these graves. These are people whose graves are in some cases known about and who have family connections in Cannon Ball. We want an opportunity to rebury our relatives. We normally are given this opportunity if gravesites are disturbed.
I do not believe that the timing of this construction was an accident or coincidence. Based on my observations, the nearest area of construction in the right of way west of Highway 1806 is around 20 miles away. It appears that DAPL drove the bulldozers approximately 20 miles of uncleared right of way to access the precise area that we surveyed and described in my declaration. The work started very early in the morning and they were accompanied by private security with dogs and with a helicopter overhead, indicating that the work was planned with care and that controversy was expected.
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Federal authorities are taking most humpback whales off the endangered species list, saying they have recovered enough in the last 40 years to warrant being removed.
The National Marine Fisheries Service (NMFS) said on Monday that nine of the 14 distinct populations of humpbacks would be removed, while four distinct populations remain listed as endangered and one as threatened.
Related: Kayaker captures video of humpback whales feasting in San Francisco Bay
Continue reading..."Just as I believe the Paris agreement will ultimately prove to be a turning point for our planet, I believe that history will judge today's efforts as pivotal. We have a saying in America that you need to put your money where your mouth is. And when it comes to combating climate change that is what we are doing ... we are leading by example."
"When the two largest emitters lock arms to solve climate change, that is when you know we are on the right track," said David Waskow from the World Resources Institute: "Never before have these two countries worked so closely together to address a global challenge. There's no question that this historic partnership on climate change will be one of the defining legacies of Obama's presidency."
"The stretching of resources due to the strain placed on the ecological carrying capacity and the economic stratification of society into Elites and Masses. In unequal societies, Elites grow and consume too much, resulting in a famine among Commoners that eventually causes the collapse of society."
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Before they compete in Rio, the soccer players on the U.S. Paralympic team attend a series of grueling training camps. The short film 2-3-1 goes inside this preparation and features the perspectives of the team members themselves. “Our hope is that this film will empower those dealing with psychological trauma and physical disabilities and ultimately shine a light on the beauty of the human spirit,” said Jefferis Gray, the film's writer and producer. 2-3-1 was directed by John Merizalde and produced by Whitelist. To learn more about the Paralympic team, you can visit its website.
At Miss Hispanidad Gay 2016, competitors vie for the crown and to represent North Carolina's Hispanic community. The pageant is particularly relevant today: it's a latino, LGBT event in a state that has recently passed laws that repeal the civil rights of trans people. “It's not acceptable in society to kiss or hold hands with our partner,” says Oskar Menen, who goes by the stage name of Gaga L'Draga. “I think the public out there is missing some tolerance for our community.” The Atlantic travelled to Durham, North Carolina, to film the event and get the perspectives of competitors and organizers.
andy.gittos posted a photo:
Another sun set view from Greenwich Park in London
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Thanks for visiting! Prints and downloads are available from my website... www.andygittos.com
The Great Pyramids of Giza are located on the outskirts of Cairo, Egypt. Dating back to 2580 BC, the Great Pyramid, the largest structure at the site, is the oldest of the Seven Wonders of the Ancient world and the only one to remain largely intact. With an estimated 2,300,000 stone blocks weighing from 2 to 30 tons each, the 481 foot pyramid was the tallest structure in the world for more than 3,800 years.
29°58′34″N 31°7′58″E
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