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Chinese - Mandarin Audio Request

khatzumoto
313 Characters / 1 Recordings / 0 Comments

赤裸的真相
毛髮在哺乳動物身上具有重要的保護功能, 但我們人類為何褪去了一身濃密的體毛,變得如此赤裸?

重點提要
■人類是靈長類中唯一沒有濃密體毛的動物。
■為了適應環境的轉變,行走較遠的距離以取得飲水和食物,人類祖先失去了厚重體毛。
■化石標本和基因研究提供了這項轉變發生時間的線索。
■無毛的性狀為人類腦容量的增加和象徵性思考的演化奠定了基礎。

在所有靈長類中,只有人類擁有與眾不同、幾乎沒有毛髮的光滑皮膚,其他家族成員都覆蓋著濃密的毛:從吼猴的黑短鬃毛,到紅毛猩猩的銅色長毛。事實上,大多數哺乳動物身上都有毛。沒錯,人類頭上是留著頭髮,身體某些部位也有體毛,但是和其他的近親比起來,即使毛髮最濃密的人基本上都算光禿。

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