A rock is a rock is a rock...right? Well, maybe. Geologists and geochemists who study the rock that makes up our planet have found that the solid rock under our feet may not be as solid as we think.
Today on the Best Of Our Knowledge, our Astrobiology series continues with a look at the constant shift of the structure of the Earth...and how that may have clues to the origins of life on the planet.
We'll also spend an academic minute studying life on the Bering Strait...before it was a strait.