During our month of “What Ifs,” we’ve gone from doubling Earth to halving the Sun to everyone trying to jump at the same time, and we’re wrapping things up back at ground level: What if the ...

Earth's continents are set to merge into a single landmass over the next 250 million years, an animation shows. The animation was posted Tuesday to Reddit, where it quickly gained over 3,500 comments ...

Humans and other mammals may only exist for another 250 million years on Earth — which is about as long as mammals have existed here at all — according to a new study that predicts the continents will ...