That Time the Earth Almost Suffocated

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Scientists may have figured out what caused a potential mass extinction over half a billion years ago and separately discovered a live animal that we had only known about through fossils!

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Sources:
https://www.eurekalert.org/news-releases/970480
https://www.pnas.org/doi/10.1073/pnas.2207475119
https://www.pnas.org/doi/abs/10.1073/pnas.2006087117
https://www.researchgate.net/profile/Jennifer-Mcelwain/publication/5924846_Mass_extinction_events_and_the_plant_fossil_record/links/5b10f0664585150a0a5e26fe/Mass-extinction-events-and-the-plant-fossil-record.pdf
https://www.sciencedirect.com/science/article/abs/pii/S016953471830140X
https://royalsocietypublishing.org/doi/10.1098/rspb.2015.1003
https://www.science.org/content/article/are-we-middle-sixth-mass-extinction

https://zookeys.pensoft.net/article/95139/element/7/0/Typhlogobius%20californiensis/
https://www.eurekalert.org/news-releases/970516

Images:
https://commons.wikimedia.org/wiki/File:Smithsonian_Museum_of_Natural_History_Triceratops.jpg
https://commons.wikimedia.org/wiki/File:Extinction_Intensity.svg
https://commons.wikimedia.org/wiki/File:Ediacaran_sea.png
https://www.eurekalert.org/multimedia/964210
https://www.gettyimages.com/detail/illustration/murmansk-oblast-and-kola-peninsula-gray-royalty-free-illustration/1403681248?phrase=white%20sea&adppopup=true
https://www.gettyimages.com/detail/illustration/southern-africa-political-map-royalty-free-illustration/831379044?phrase=namibia%20map&adppopup=true
https://commons.wikimedia.org/wiki/File:DickinsoniaCostata.jpg
https://commons.wikimedia.org/wiki/File:Pteridinium_simplex_Namibia.JPG
https://www.gettyimages.com/detail/photo/dickinsonia-extinct-creatures-of-the-ediacaran-era-royalty-free-image/1134854508?phrase=ediacaran&adppopup=true
https://www.eurekalert.org/multimedia/649860
https://en.wikipedia.org/wiki/File:Ausia_fenestra.jpg
https://commons.wikimedia.org/wiki/File:Bufo_periglenes2.jpg
https://www.gettyimages.com/detail/video/aerial-over-palm-tree-lined-road-along-the-pacific-ocean-stock-footage/1329770189?phrase=santa%20barbara%20beach&adppopup=true
https://zookeys.pensoft.net/article/95139/element/2/12//
https://commons.wikimedia.org/wiki/File:Podaac_blob_colordata_sst2015.jpg
https://www.gettyimages.com/detail/video/canoe-is-moving-over-a-small-river-in-the-amazon-stock-footage/1366029891?phrase=amazon%20rainforest
https://www.gettyimages.com/detail/video/drone-aerial-view-of-deforestation-in-amazon-rainforest-stock-footage/1336901685?phrase=amazon%20rainforest