What causes extinction? Do all extinction events have a common cause?
Background versus mass extinctions, bad genes versus bad luck, the Red Queen versus Court Jester, the big five mass extinctions, the 6th mass extinctions, how climate change related to extinction, and a general theory of extinction.

References: Prothero, D.R. (2013). Bringing Fossils to Life: An Introduction to Paleobiology. Third Edition. Chapter 6: Extinction. pp. 322347. Columbia University Press: https://amzn.to/3nU0ada

GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!)

0:00 How many things have gone extinct?
1:01 The big 5 mass extinctions
2:01 Why do species go extinct?
7:12 What caused the mass extinctions?
8:48 PermoTriassic extinction (largest extinction)
11:14 Summary of causes for the PT extinction
11:32 Cretaceous Tertiary extinction (KT or KP boundary)
12:56 Devonian mass extinction
13:43 Ordovician mass extinction
14:02 Late Triassic mass extinction
15:09 Do all extinction events have a common cause?

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Image sources:
https://www.evolvingsciences.com/Exti...
https://evolution.berkeley.edu/histor...
https://birdeden.com/dodobirdfacts
https://clickandtreat.com/wordpress/?...
https://www.digitaltrends.com/coolte...
https://hyenaproject.com/researchto...
https://indiankarst.weebly.com/upload...
http://fossilsandshit.com/thegreates...
https://upload.wikimedia.org/wikipedi...
https://geology.com/articles/supercon...
https://worldbuilding.stackexchange.c...
https://greatlakesledger.com/2018/08/...
http://www.geologyin.com/2015/12/perm...
https://www.scoopnest.com/user/nytime...
https://thescentedhound.com/tag/chicx...
https://www.sciencecodex.com/new_tigh...

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