Imagine a world where the oceans all dried up, leaving only dry land behind. NASA reveals a remarkable video showing what Earth would look like if the oceans drained.

There’s not enough ice on the Earth’s polar caps to flood the entire planet should global warming turn it all into water. But sea levels will keep rising, ...

If you can't get to a beach this weekend, you can still see waves. Just look up. Clouds, after all, are sculpted by waves of air. These clouds, in Birmingham, Ala., were formed when two layers of ...

“These losses in the ocean are paralleling what humans did to land animals some 50,000 to 10,000 years ago, when we wiped out around half of the big-bodied mammal species on Earth, like mammoths ...