You may hear jokes about "oceanfront property in A...  ...owever, there was a lot going on down there where tectonic plates were colliding. I don’t know if you can imagin...

James Cameron's dive to the deepest part of the Mariana Trench took him seven miles below sea level. Why is this abyss so deep? There are at least three contributing reasons that come together. One reason the Mariana Tr...