The earth has been through some major changes! Animals we wish still existed: youtu.be/wutj5z1lElU SUBSCRIBE (it's free): bit.ly/10kWnZ7 GET THE BOOK: asapscience.com/book/ Written by Tyler Irving (@tylereirving), Mitchell Moffit and Greg Brown Instagram and Twitter: @whalewatchmeplz and @mitchellmoffit Clickable: bit.ly/16F1jeC and bit.ly/15J7ube AsapINSTAGRAM: instagram.com/asapscience/ Facebook: facebook.com/AsapSCIENCE Twitter: twitter.com/AsapSCIENCE Tumblr: asapscience.tumblr.com Vine: Search "AsapSCIENCE" on vine! SNAPCHAT 'whalewatchmeplz' and 'pixelmitch' Created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz). Send us stuff! ASAPSCIENCE INC. P.O. Box 93, Toronto P Toronto, ON, M5S2S6 Further Reading-- Overviews: listverse.com/2012/03/09/top-10-mass-extinctions/ www.nature.com/nature/journal/v471/n7336/full/nature09678.html Ordovician: Role of CO2 levels: www.sciencedirect.com/science/article/pii/S003101821000115X geology.gsapubs.org/content/37/10/951.abstract www.skepticalscience.com/CO2-was-higher-in-late-Ordovician.htm www.newscientist.com/article/dn18618-highcarbon-ice-age-mystery-solved.html#.VK1lhmTF98s Devonian: en.wikipedia.org/wiki/Late_Devonian_extinction www.devoniantimes.org/opportunity/massExtinction.html www.nhm.ac.uk/nature-online/life/dinosaurs-other-extinct-creatures/mass-extinctions/late-devonian-mass-extinction/index.html Permian Good overviews: science.nationalgeographic.com/science/prehistoric-world/permian-extinction/ www.businessinsider.com/volcanic-eruptions-caused-permian-extinction-2014-12 Size of lava fields: en.wikipedia.org/wiki/Siberian_Traps Effect of volcanoes; articles.latimes.com/2005/jan/21/science/sci-extinct21 www.livescience.com/41909-new-clues-permian-mass-extinction.html Recovery: scitechdaily.com/earth-recovered-10-million-years-after-permian-triassic-mass-extinction/ Triassic www.nhm.ac.uk/nature-online/life/dinosaurs-other-extinct-creatures/mass-extinctions/end-triassic-mass-extinction/index.html earth.columbia.edu/articles/view/3070 www.wired.com/2011/07/mass-extinction-methane/ Cretaceous: www.nhm.ac.uk/nature-online/life/dinosaurs-other-extinct-creatures/mass-extinctions/end-cretaceous-mass-extinction/index.html www.space.com/19681-dinosaur-killing-asteroid-chicxulub-crater.html 6th mass extinction: www.businessinsider.com/earths-sixth-mass-extinction-is-already-happening-2014-7 www.independent.co.uk/environment/animal-extinction--the-greatest-threat-to-mankind- 397939.html By the numbers: www.sciencemag.org/content/345/6195/401 Extinction rates: www.nature.com/nature/journal/v471/n7336/full/nature09678.html onlinelibrary.wiley.com/doi/10.1111/cobi.12380/abstract

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