PBS Eons has a new episode. This interesting video is about the origin of complex life. When did animals first show up? How long before the Cambian Explosion did complex life arrive on Earth.
What are animal-like fossils doing in rocks a billion years old, and what does that mean for our understanding of their evolution and geologic time itself? Turns out, there might've been a long, slow-burning fuse that ultimately ignited the Cambrian Explosion.
