A timeline of life on Earth: 4 billion years of history

Have you ever wondered how we got here on Earth and how it all started? From the Archean Eon to the Holocene Epoch, some pretty amazing things happened. Check out this SciShow miniseries hosted by Stefan Chin for a look at prehistoric life on Earth, as we move forward today!

For the full series on life on Earth, visit: https://www.youtube.com/eons

Part 1 – Survival is hard: 0:41
Part 2 – When life exploded: 9:34
Part 3 – Dinosaur time! : 19:46
Part 4 – The advent of humans: 28:14
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