At the top of the world, there is a sea—the remains of one, at least. The summit rocks of Mount Everest, the highest ...

"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the ...

Deep in the Amazon rainforest, a mysterious river stays at near-boiling temperatures year-round, baffling scientists. How is this possible, and what forces are keeping it so hot? Discover the ...