The Continental Drift

The earth is like a giant nuclear battery where these nuclear decays are heating up the earth and keeping it toasty. So actually the earth had to be much, much older than just a few tens of millions of years to have cooled this much. There's a lot of action happening at the edges of these continental plates. This is for example, in the middle of the Atlantic Ocean, there's this ridge that was discovered in the 1940s where magma is bubbling up from within the earth. That's one example of how we get like motion at the edge of these plates.