Hyenas Once Lived in the Frigid Arctic

Prehistoric teeth prove that hyenas once roamed the Arctic and the relationship between ancient crocodiles and climate is more complicated than we thought.

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Sources:
Arctic Hyenas
http://dx.doi.org/10.5334/oq.64
https://www.eurekalert.org/emb_releases/2019-06/uab-ftr061119.php
https://www.sciencedirect.com/science/article/pii/S1055790305003623
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https://www.nps.gov/articles/beringiamegafauna.htm
https://cdn.elifesciences.org/articles/34773/elife-34773-v1.pdf
Croc Climate Clocks
http://dx.doi.org/10.1080/02724634.2019.1617723
https://www.eurekalert.org/emb_releases/2019-06/tfg-ccc061419.php
https://www.sciencedirect.com/science/article/pii/S0031018297001089
https://www.nature.com/articles/ncomms9438
http://www.palaeogeography.net/uploads/1/0/0/8/100869804/markwick_2007.pdf
https://www.researchgate.net/publication/285634246_The_Eocene-Oligocene_Transition
https://www.sciencedirect.com/science/article/pii/S0031018211001805
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Images:
https://www.istockphoto.com/photo/spotted-hyenas-in-the-wilderness-of-africa-gm1064310770-284577685
https://www.istockphoto.com/photo/brown-hyena-gm512962341-47079548
https://www.istockphoto.com/photo/striped-hyena-on-a-morning-walk-gm857719388-141483243
https://www.istockphoto.com/photo/aardwolf-gm538361188-95721391
https://www.istockphoto.com/photo/spotted-hyena-gm923784292-253562175
https://www.istockphoto.com/photo/north-pole-3d-render-planet-earth-gm691853736-127612845
https://en.wikipedia.org/wiki/File:Beringia_land_bridge-noaagov.gif
https://www.eurekalert.org/multimedia/res/203324.php?from=432456
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https://www.istockphoto.com/photo/argentina-patagonia-glacier-perito-moreno-national-park-gm155144198-18407694
https://www.eurekalert.org/multimedia/res/203323.php?from=432456
https://www.istockphoto.com/photo/short-faced-bear-gm1133043533-300609780
https://www.istockphoto.com/photo/small-crocodile-close-up-gm1002498262-270908440
https://www.istockphoto.com/photo/adult-alligator-sunning-on-a-log-gm1014432226-273082571
https://commons.wikimedia.org/wiki/File:Hesperosuchus_flipped.jpg
https://commons.wikimedia.org/wiki/File:Oligocene.jpg
https://www.videoblocks.com/video/crocodile-alligator-on-an-ox-sksmm2j
https://www.videoblocks.com/video/alligators-slumbering-in-the-shade-on-a-sandy-river-bank-camera-movement-filmed-from-a-boat-and-pull-focus-moving-between-foreground-and-background-animals-includes-original-audio-fh-6bgu
https://www.videoblocks.com/video/a-captive-long-nosed-gavialidae-crocodile-basking-motionless-by-the-banks-of-a-still-pond-in-the-heat-of-the-indian-sun-d8q6me5
https://www.videoblocks.com/video/group-of-friends-looking-at-a-tablet-pc-watching-sports-game-cheering-together-bfaz8h-bipk0tq03
https://www.istockphoto.com/photo/a-beautiful-day-in-the-woods-between-cold-and-snow-gm1033090626-276678137
https://www.istockphoto.com/photo/spotted-hyena-isolated-gm451043463-25076582
https://www.istockphoto.com/photo/spotted-hyena-isolated-gm451043467-25076588
https://www.istockphoto.com/photo/spotted-hyena-on-white-gm509493994-85813285

Видео Hyenas Once Lived in the Frigid Arctic канала SciShow