The Precambrian

This is the first in a series of videos where That Bio Doc takes on a tour of the evolutionary history of life on Earth. In this video, TBD talks about the Precambrian supereon, which covers the first ~4 billion years of life on the planet Earth. Watch and learn what early life on Earth looked like, how oxygen was introduced into the Earth's atmosphere, and how endosymbiosis changed life on Earth forever!