11 minutes
Published October 2014

What is the Evidence for Evolution?


Biologists teach that all living things on Earth are related. Is there any solid evidence to back this claim? Join us as we explore the facts! We start with a close look at the origin of whales from land mammals, and then touch on the origins of several other critters, including our own species.

Explore Further

Special thanks to Dr. Hans Thewissen and Dr. Philip D. Gingerich for helping edit our script, answer our questions, and for getting us photos of embryos and fossils.


  • Dolphin embryos shown in this animation come from spotted dolphins. Adult is a dusky dolphin. 
  • Photo of bowhead whale pelvis comes from the Department of Wildlife Management, Barrow, Alaska