アメリカ自然史博物館のインスタグラム(amnh) - 3月6日 07時57分

How did this fluffy little creature turn into a massive killing machine? Every terrifying T. rex was once a helpless hatchling like this. And all tyrannosaurs evolved from smaller ancestors—some little bigger than this as adults. Most people know tyrannosaurs from a single, iconic species: Tyrannosaurus rex. But the full tyrannosaur story includes dozens of different species and spans 100 million years of evolution, with Tyrannosaurus rex appearing only at the very end!
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Special exhibition T. rex: The Ultimate Predator opens to the public on Monday, March 11! Museum Members can see it first this weekend—use the #linkinbio for more info.
GIF: © AMNH / B. Peterson

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