4 Mysterious Extinctions from Earth’s History

Nowadays, we're pretty confident about how the dinosaurs died out, but there are still other extinctions throughout Earth's history, some big, some small, that remain unsolved.

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Sources:
https://www.sciencenews.org/article/shark-die-off-mystery-fossils-pacific-ocean-paleontology
https://science.sciencemag.org/content/372/6546/1105
https://www.pnas.org/content/117/29/17084
https://australian.museum/learn/australia-over-time/megafauna/
https://www.nature.com/articles/s41467-021-22506-4
https://www.nature.com/articles/s41467-021-21201-8
https://www.pnas.org/content/117/46/28555
https://www.cbsnews.com/news/evidence-of-little-known-mass-extinction-uncovered/
https://www.nationalgeographic.com/science/article/earth-had-more-mass-extinctions-than-realized-end-guadalupian
https://royalsocietypublishing.org/doi/10.1098/rspb.2015.0834
https://www.britannica.com/topic/Neanderthal
https://www.discovermagazine.com/planet-earth/a-leading-theory-behind-neanderthal-extinction-may-surprise-you
https://www.nature.com/scitable/knowledge/library/what-happened-to-the-neanderthals-68245020/
https://news.stanford.edu/2019/11/07/new-theory-neanderthal-extinction/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4947341/
https://imet.usmd.edu/activities/what-genetic-diversity

Images:
https://www.science.org/doi/10.1126/science.aaz3549
https://www.flickr.com/photos/14405058@N08/2956425260
https://commons.wikimedia.org/wiki/File:Range_of_NeanderthalsAColoured.png
https://commons.wikimedia.org/wiki/File:Reconstitution_sepulture_Chapelle-aux-Saints.jpg
https://www.storyblocks.com/video/stock/valentines-day-heart-love-wedding-anniversary-abstract-particles-background-loop-bsjzwzabzjd0qz2rw
https://commons.wikimedia.org/wiki/File:Neanderthalensis.jpg
https://www.istockphoto.com/photo/grey-reef-sharks-school-fakarava-island-polynesia-gm478400019-35929310
https://www.istockphoto.com/photo/fossilized-shark-teeth-gm625802540-110284165
https://commons.wikimedia.org/wiki/File:Lebachacanthus_senckenbergianus_Shark_Fossil.jpg
https://www.istockphoto.com/photo/silhouettes-of-sharks-underwater-in-ocean-against-bright-light-3d-rendered-gm1151479396-312086880
https://commons.wikimedia.org/wiki/File:Kitefin_Shark.jpg
https://commons.wikimedia.org/wiki/File:Denticules_cutan%C3%A9s_de_petite_roussette_Scyliorhinus_canicula.jpg
https://commons.wikimedia.org/wiki/File:Squalus_hawaiiensis_(10.3897-zookeys.798.28375)_Figure_5.jpg
https://www.istockphoto.com/photo/photo-showing-layers-of-earth-beneath-the-asphalt-gm134043227-18318711
https://www.science.org/doi/10.1126/science.aaz3549
https://commons.wikimedia.org/wiki/File:Denticules_cutan%C3%A9s_du_requin_citron_Negaprion_brevirostris_vus_au_microscope_%C3%A9lectronique_%C3%A0_balayage.jpg
https://commons.wikimedia.org/wiki/File:Pleistocene_mammals_of_Chile.jpg
https://commons.wikimedia.org/wiki/File:Male_%26_female_mastodons,_front.jpg
https://www.flickr.com/photos/101561334@N08/9778466382/
https://commons.wikimedia.org/wiki/File:Glyptodon_old_drawing.jpg
https://commons.wikimedia.org/wiki/File:Weichsel-W%C3%BCrm-Glaciation.png
https://commons.wikimedia.org/wiki/File:Ice_Age_Temperature.png
https://commons.wikimedia.org/wiki/File:Scandinavia.TMO2003050.jpg
https://commons.wikimedia.org/wiki/File:Doedicurus_and_Glyptodon.jpg
https://www.istockphoto.com/vector/geochronological-scale-gm481115548-68935323
https://commons.wikimedia.org/wiki/File:Map_of_Karoo.png
https://commons.wikimedia.org/wiki/File:Titanophoneus2.jpg
https://www.istockphoto.com/vector/jurassic-period-landscape-with-volcano-and-meteor-gm1219105593-356474724
https://zookeys.pensoft.net/article/28375/list/2/
https://www.istockphoto.com/vector/extinct-dodo-from-french-textbook-in-1887-gm992299148-268863843
https://commons.wikimedia.org/wiki/File:Skull_of_Neanderthal_from_Gibraltar,_Welcome_to_the_Neandertals,_Brno,187896.jpg
https://commons.wikimedia.org/wiki/File:Toxoprion.png
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.0060099