National Geographic photographer Brian Skerry has been diving in the Gulf of Maine for more than 40 years. After learning these waters were a harbinger of climate change, he set out to document the ...

Scientists believe the best chances for finding life are not on planets, but on the moons orbiting them. Hunter found alive after going missing for nearly 3 weeks What taking melatonin could reveal ...

Human hands shaped them. Nature perfected them. Now, super pigs roam continents as unstoppable invaders. From their roots in domestication to their explosive reemergence in the wild, this is the ...

Two-time Olympic marathon champion Eliud Kipchoge says he'll run seven marathons on seven continents over the next two years to raise funds for causes he believes in -- even as he continues to race at ...