2026年5月20日 0:29 ET 发布 · 更新于 6 个月前 · 1 个来源
T. rex’s tiny arms may have evolved for a surprisingly brutal reason
Science Daily
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原始报道
Why did T. rex have such tiny arms? Scientists now think it’s because its giant head became the ultimate hunting tool. Across multiple dinosaur groups, stronger skulls and crushing jaws evolved alongside shrinking forelimbs, especially in predators hunting enormous prey. In other words, once the bite became deadly enough, the arms may have stopped mattering.
原文