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Ancient Carnivorous Dread-Possum Is Upending The History Of Mammals

During the 65 million years following the extinction of the dinosaurs, the success story of the mammals has been more than a little imbalanced. Eutherians (placental mammals like dogs, horses, you and I) had an evolutionary rager, exploding in diversity and filling vacant ecological roles across the Northern Hemisphere. Metatherians (including marsupials like kangaroos and koalas) only got a modest foothold in the smaller, southern continents of South America and Australia.
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