A vast ocean chock-full of microbes may have once covered more than a third of Mars's surface, according to a new analysis of ...

To keep global warming below 1.5°C, a new study finds, we’ll also have to retire a lot of old plants and factories.

Hike through secret slot canyons, spot endangered California condors, visit sacred Navajo sites, and kayak a stunning 10-mile ...

With bountiful organic produce, sustainable wineries and a glorious Pacific coastline, Sonoma county in northern California ...

Best known for one of the world’s most incredible wildlife spectacles — the Great Migration across the Serengeti — this East ...

In the 1960s, when the possibility of an asteroid impact alarmed the American public for the first time, MIT students drafted ...

There are tens of thousands of castles in Germany. Here are ten of our favorites that you can visit—or maybe even book as ...

Heavy drinking increases the risk of ICH through several overlapping mechanisms. One is that "alcohol accelerates brain ...

In just one day, the sun delivers about as much energy as has been consumed by all human beings over the past 35 years. So ...

In the October 2007 issue of Traveler, contributing editor and Real Travel columnist Daisann McLane wrote a feature story ...

Though he never set foot outside his Vostok 1 spacecraft as it made a complete orbit around Earth, Gagarin’s journey was a ...

As NASA prepared astronauts for its second mission into space, National Geographic had exclusive behind-the-scenes access for ...