In celebration of Earth Month, for a limited time get a bonus issue with your National Geographic subscription! From breathtaking photography to in-depth articles, explore nature, science, history ...

A version of this story appears in the May 2018 issue of National Geographic magazine. At National Geographic, we’ve helped you explore the world for 130 years. With the launch of the May print ...

This story appears in the March 2017 issue of National Geographic magazine. In the past three years, this magazine has run 34 stories on climate change—including a special issue devoted entirely ...

This story appears in the April 2009 issue of National Geographic magazine. Five minutes past midnight in Svalbard: The wild world is awake and clattering. At the edge of a sheltered estuary in ...

This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate, sweeping the void with our dive lights. Fifty feet from the surface looms a pale haze, less ...

This story appears in the March 2011 issue of National Geographic magazine. The path leads up a hill, across a fast-moving stream, back across the stream, and then past the carcass of a sheep.