This story appears in the April 2011 issue of National Geographic magazine. Castello Aragonese is a tiny island that rises straight out of the Tyrrhenian Sea like ... Their shells were so thin ...

This story appears in the May 2011 issue of National Geographic magazine. Not far beneath the surface of the Coral Sea, where the Great ... to build their limestone shells and skeletons.

This photo appears in the February 2017 issue of National Geographic magazine. Learn more about ocean life in Sea of Hope: America’s Underwater Treasures, premiering Sunday, January 15th at 7/6c ...

This story appears in the February 2017 issue of National Geographic magazine. Learn more about ocean life in Sea of Hope: America’s Underwater Treasures, premiering Sunday, January 15th at 7/6c ...

This story appears in the June 2011 issue of National Geographic magazine ... holding the sea star and the deceased in one hand and separating the mussel's shells a bit with the other.

This story appears in the December 2012 issue of National Geographic magazine. When signs of a lost world at the bottom of the North Sea first began to appear, no one wanted to believe them.

Read this story and more in the June 2018 issue of National Geographic magazine. When photographer Mandy Barker returned to the English beach where she collected shells as a child, she found a ...

This story appears in the July 2017 issue of National Geographic magazine. Photographer Brian ... is to create “images that celebrate the sea yet highlight environmental problems.” ...

Read this story and more in the June 2018 issue of National ... Geographic magazine. On a boat off Costa Rica, a biologist uses pliers from a Swiss army knife to try to extract a plastic straw ...

This story appears in the October 2010 issue of National Geographic magazine ... formed from the bodies of ancient sea creatures with calcium carbonate shells, skeletons, or cell walls.

While all other sea turtles have hard, bony shells, the inky-blue carapace of the leatherback is somewhat flexible and almost rubbery to the touch. Ridges along the carapace help give it a more ...

This story appear in the March/April 2017 issue of National Geographic History magazine. While probing the depths of the Black Sea last year, a team of scientists made a surprising discovery ...