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The T Rex’s tiny baby arms might have been way more useful than they seem

霸王龙的小胳膊可能比看上去更有用



Running into a Tyrannosaurus rex in the wild would have been a truly frightening thing for just about any animal that roamed the earth between 65 million and 80 million years ago, and for an obvious reason. The mighty meat-eater was huge in size and had a mouth built to turn bones into powder. but nobody was afraid of its puny little arms… or were they?

在野外遇到霸王龙对6500万到8千万年前在地球上游荡的任何动物来说都是一件真正可怕的事情。原因很明显,这只巨大的食肉动物体型庞大,有一张能把骨头变成粉末的嘴。但没有人害怕它的小胳膊。

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The idea here is that the T. rex knew its jaws were its most potent weapon and so it used its arms to keep prey at the perfect biting distance. We’ll of course never know for sure unless we could somehow watch a T. rex or similar upright carnivore find a meal, but the researchers are confident in what the fossils and modern animals tell them about how the dinosaur could move its limbs.

这里的想法是,霸王龙知道它的下颌是它最有力的武器,所以它用它的手臂保持猎物在完美的咬合距离。我们当然永远无法确定,除非我们能以某种方式观察到霸王龙或类似的直立食肉动物寻找食物,但研究人员对此充满信心,化石和现代动物告诉他们恐龙如何移动四肢。