Extinction of dinosaurs 'led to mammals growing 1000 times bigger'

Mammals grew in size 1000-fold after being left a food bonanza by the extinction of the dinosaurs, research has shown.
From their origins as small shrew-like animals, some became enormously large - and the same pattern was seen all over the world.
They included giants such as Indricotherium, a hornless rhinoceros relative from Eurasia that stood 18 feet high and would have dwarfed an African elephant... Read More

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