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爪子 v.s. 指甲
2,464,010 views |
馬修‧柏爾斯 |
TED-Ed
• October 2019
Read transcript
爪子。通常在全世界的動物身上可以看見爪子，是大自然中最多功能的工具之一。熊類用爪子做挖掘和防禦。老鷹像針一般的爪子可以貫穿其獵物的頭骨。就連靈長類的祖先，以前也會運用這些了不起的附屬物，直到爪子演化成指甲。所以，這種天擇適應是怎麼演變形成的？馬修‧柏爾斯帶大家來一探究竟。 完整課程：https://ed.ted.com/lessons/claws-vs-nails-matthew-borths 課程：馬修‧柏爾斯 導演：Augenblick Studios
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