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Photo by @BrianSkerry A Great White Shark swims through a school of jacks in the waters off South Australia. New research is revealing fascinating and complex lives of this dominant apex predator species of shark. One study reveals that white sharks live well into their 70s which is longer than previously believed. What wisdom might a long lived animal that travels thousands of miles each year possess? And as with all predators their value is substantial for the health of the worlds oceans…

Photo by @stephenwilkes: I'm headed out fishing this Saturday morning--enjoying every last drop of the final weeks of summer. #iphoneonly #fishing #sailboat #waves #ocean #BlockIsland #RI #beautifulday by natgeo

Photo by @tbfrost A school of glass fish surround a coral head in Raja Ampat Papua Indonesia. Raja Ampat harbors the most bio-diverse reef system in the world according to marine scientists. David Doubilet did a Nat Geo magazine story here in 2007 called Ultra Marine. Check it out for more about this amazing place. This photo was made just 3 days ago. For more from Raja Ampat and other wild places please follow me @tbfrost by natgeo

Photo by @BrianSkerry A pod of Narwhals rest on the surface in the waters of the high arctic off Canadas Navy Board Inlet. Narwhals are called the unicorn whale due to their tusk which is actually a canine tooth that protrudes from the animals lip. Male narwhal tusks can grow to lengths of nearly nine feet. Coverage from an upcoming story in @natgeo about climate change in the arctic and the effect on wildlife and culture. For more ocean animal pics follow @BrianSkerry @thephotosociety…

Photograph by @thomaspeschak A blue whale surfaces close to a traditional Sri Lankan vessel. The worlds largest whale migrates past Sri Lanka's south and east coast every year. #srilanka #bluewhale @thephotosociety @natgeocreative by natgeo

Photo by @BrianSkerry A young harbor seal peeks out from behind surf grass in a kelp forest on Cortes Banks a undersea mountain range located 100-miles off the coast of San Diego CA. Photographed #onassignment for @natgeo. @BrianSkerry will be presenting a special lecture of his work entitled Ocean Soul at the @Annenbergspace in Los Angeles on December 3rd! #seals #seadog #seamounts #nature #love #picoftheday #dreams #love @thephotosociety @natgeocreative by natgeo

Photo taken by @stevemccurryofficial // I photographed this little boy in a bicycle sling and his father at Banteay Srei Angkor Cambodia. The way the child is gripping the handlebars mirrors his fathers' hands. Check out our current project in Afghanistan: @imagine_asia by natgeo

What Caused 'The Great Dying' --"70 percent of Earth's Land Species Disappeared in a Geological Instant" (MIT)

Photo by @stephenwilkes: Craters left by the US air strikes during the Vietnam War pepper the elegant landscape of Phonsavanh Laos. The bombings left pock rice fields like this one in Xiangkhouang Province riddled with craters now often used as fishponds or for irrigating crops. The U.S. dropped over 2 million tons of bombs on Laos during the Vietnam War this period was known in Laos and to the CIA as the Secret War. Find more on this subject on my account @stephenwilkes and in the feature…

Red Sludge From Brazilian Dam Collapse Reaches the Atlantic (21 photos)