TED-Ed
TED-Ed: Scientists are obsessed with this lake | Nicola Storelli and Daniele Zanzi
In the millions of years since oxygen began saturating Earth’s oceans and atmosphere, most organisms have evolved to rely on this gas. However, there are some places where oxygen-averse microorganisms like those from Earth’s earliest...
NASA
On a Mission: Season 3, Episode 9: Life Bound
We hike in the Australian Outback with Abigail Allwood to visit the most ancient fossils on Earth, and track the imprint of life over space and time with David Grinspoon.
Khan Academy
Khan Academy: Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon
Learn about the great oxygenation event that lead to the formation of the ozone layer in this video lecture. Also the arrival of eukaryotes during the Proterozoic Eon. [9:56]