When we look inside the fin, we see a shoulder, we see an elbow, and we see an early version of a wrist, which is very similar to that of all animals that also walk on land.

Most of the major joints of the fin are functional in this fish. The shoulder, elbow, and even parts of the wrist are already there and working in ways similar to the earliest land-living animals.

Most of the major joints of the fin are functional in this fish.

We did a few high fives when we uncovered the fossil, but there's only so much celebrating you can do in the Arctic.

The fin is coming early this siecle.

The world is filled with puzzles, all kinds of interesting questions and it's our challenge to figure them out. It's not just like this static file cabinet of things that human beings know. It's ever expanding.