10 of the Worst Extinction Events on Planet Earth

An exploration of ten of the worst extinction events in our planet's history.https://www.patreon.com/johnmichaelgodierMusic:Cylinder Eight by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)Source: http://chriszabriskie.com/cylinders/Artist: http://chriszabriskie.com/Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)Source: http://chriszabriskie.com/cylinders/Artist: http://chriszabriskie.com/Cylinder Three by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)Source: http://chriszabriskie.com/cylinders/Artist: http://chriszabriskie.com/Bathed in the Light - Calming by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100308Artist: http://incompetech.com/