“All the Fermi Paradox tells you is that civilizations are rare. It doesn’t tell you why they’re rare,” says Ian Crawford, a ...

Scientists in northwest Wyoming found remnants of an ancient forest, frozen in ice on a barren tundra in northwest Wyoming. Uncovering the rest of the story is a race against time. The ghostly fallen ...

In May, a team of spelunkers rappelled into the dark heart of a 630-foot-deep sinkhole in China’s Guangxi region. Near the southern border, Guangxi is home to a landscape of mountainous rock, formed ...