A Brief History of Life: When Life Exploded

Right at the beginning of the Paleozoic, there was a huge explosion of more complex life. And that’s when things started to get really interesting. This is our second installment on the history of life, but you can watch in any order you like!

If you liked this video, check out more videos about natural history and paleontology on SciShow’s sister channel, Eons: https://www.youtube.com/eons

For A Brief History of Life
Part 1: https://www.youtube.com/watch?v=7HiFxKK2yjU
Part 3: https://youtu.be/oGVFVX6NTLs
Part 4: https://youtu.be/b8sYfyQrs_Q

Hosted by: Hank Green
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Sources:
http://onlinelibrary.wiley.com/doi/10.1111/boj.12389/abstract
https://blogs.denison.edu/geosciences/2011/10/26/geos-211-how-the-neoproterozoic-oxygenation-event-affected-animal-evolution/
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http://www.nature.com/news/what-sparked-the-cambrian-explosion-1.19379
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http://burgess-shale.rom.on.ca/en/science/origin/01-life-tree.php
http://dinosaurs.about.com/od/otherprehistoriclife/a/beforedinos_2.htm
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http://www.ucmp.berkeley.edu/paleozoic/paleozoic.php
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http://www.ucmp.berkeley.edu/ordovician/ordovician.php
http://palaeos.com/paleozoic/ordovician/ordovician.htm
http://paleobiology.si.edu/geotime/main/htmlversion/silurian1.html
http://palaeos.com/paleozoic/silurian/silurian.htm
http://www.ucmp.berkeley.edu/devonian/devonian.php
http://palaeos.com/paleozoic/devonian/devonian2.htm
http://www.ucmp.berkeley.edu/carboniferous/carboniferous.php
http://palaeos.com/paleozoic/carboniferous/carboniferous.htm
http://www.ucmp.berkeley.edu/permian/permian.php
http://palaeos.com/paleozoic/permian/permian3.html
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http://www.scientificamerican.com/article/first-life-on-land/
http://www.bbc.com/news/science-environment-35698463
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http://news.bbc.co.uk/earth/hi/earth_news/newsid_9079000/9079963.stm

Images:
https://commons.wikimedia.org/wiki/File:Geologic_Clock_with_events_and_periods.svg
https://commons.wikimedia.org/wiki/File:Wales.pre-Roman.jpg
https://en.wikipedia.org/wiki/Silurian#/media/File:430Marect.jpg
https://en.wikipedia.org/wiki/Tortotubus
https://en.wikipedia.org/wiki/Silurian_(Doctor_Who)#/media/File:Silurians_2010.jpg
https://en.wikipedia.org/wiki/Placodermi#/media/File:Placoderm_anatomy.png
https://en.wikipedia.org/wiki/Paleozoic#/media/File:Ostracoderm_digital_recreation..jpg
https://en.wikipedia.org/wiki/Tetrapod#/media/File:Ichthyostega_BW.jpg
https://upload.wikimedia.org/wikipedia/commons/archive/b/ba/20130603231059%21Devonianscene-green.jpg
https://en.wikipedia.org/wiki/Carboniferous#/media/File:Meyers_b15_s0272b.jpg
https://en.wikipedia.org/wiki/Carboniferous
https://en.wikipedia.org/wiki/Paleozoic#/media/File:DimetrodonKnight.jpg
https://en.wikipedia.org/wiki/Edaphosaurus#/media/File:Edaphosaurus-cruciger_jconway.jpg
https://commons.wikimedia.org/wiki/File:Extent_of_Siberian_traps_german.png#/media/File:Extent_of_Siberian_traps-ru.svg
https://en.wikipedia.org/wiki/Archosaur