"Water, water, every where"...or so that one poem goes. And it's kinda right, because there's way more water INSIDE the Earth than on the surface. But scientists still don't know with certainty exactly how Earth got all of that...

Boeing has developed a snazzy new spacesuit and a couple studies give us clues about the history of Earth and the moon!

Princeton University physicist Paul Steinhardt describes how a given material can be tested for being of meteoretic origin by examining its oxygen isotopes.