What If You Landed on Kepler 22-B?

Six hundred and thirty-five light years away from Earth, there is a world that seems to promise something almost unimaginable: a planet covered in a vast liquid ocean...

What If Pangea Never Broke Apart?

Millions of years ago, the Earth looked very different. A huge landmass, called Pangea, covered about a third of our planet. But about 175 million years ago, the Earth...

What If Mars Had Rings Like Saturn?

Scientists theorize that many millions of years ago, Mars had rings, just like Saturn. And it looks like the red planet could be due for a new set of rings in the future...