What if giant mammals coexisted with dinosaurs? How would mammoths, ground sloths, saber-tooth cats, and more Cenozoic giants fare in the Late Cretaceous? Prehistoric megafauna in the Cretaceous were extraordinarily dangerous. This video analyzes ten megamammals and their chances of surviving in the Hell Creek formation of North America. We look at Smilodon, Elasmotherium, Megatherium, Livyatan, Perucetus, Arctodus simus, Mammuthus columbi, Gigantopithecus, Daeodon, and Paraceratherium. We analyze their ability to find food, adjust to the environment, deal with competition, and avoid the terrifying Cretaceous predators, and rank each of them on a scale of 1 to 10 in terms of survivability. They’ll confront Mesozoic natives like Tyrannosaurus rex, Triceratops, Torosaurus, Ankylosaurus, dromaeosaurs, and other ancient creatures. This speculative ecology analysis is the third episode in the series examining if Cenozoic giant mammals could survive the Mesozoic. How would they respond to a Cretaceous environment dominated by huge ceratopsians, hadrosaurs, and megatheropods? Could they survive the apex predator, Tyrannosaurus?

00:00: Tusks vs Teeth
00:52: What Was The Hell Creek Paleoenvironment Like?
02:15: Smilodon populator
04:23: Elasmotherium caucasicum
06:51: Megatherium americanum
08:11: Livyatan melvillei
09:10: Perucetus colossus
09:46: Arctodus simus
11:45: Mammuthus columbi
16:08: Gigantopithecus blacki
17:11: Daeodon shoshonensis
18:20: Paraceratherium asiaticum
19:48: Could Giant Mammals Survive Hell Creek?


Soundtrack by Paleowolf! Thumbnail art by Arturo Garcia, Lizat, London Museum of Natural History, and cisiopurple.

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