Despite starting out in the water, the fossil record suggests that vertebrates conquered both the land and the air before they conquered the depths.
So what took them so long?
Aired:
05/11/26
| Expires: | Runtime: 9m 48s
You are leaving GBH.org
You are leaving gbh.org and going to a web page that is not owned by GBH. If you are streaming, your experience will be interrupted.