Add Yahoo as a preferred source to see more of our stories on Google. Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the ...

Let me take you on a wild ride to the very edges of our Universe. But it won't be as simple as traveling through space. Because the edges that we’re talking about aren’t in space. They’re in time. The ...

Outer space contains more incredible phenomenons and unsolved mysteries than anywhere else—and we think it's just fascinating ...

Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the Earth. Floating around the atmosphere is a mixture of molecules – tiny ...