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為什麼樹懶動作這麼慢？- 肯尼．庫根 (Kenny Coogan)
5,973,916 views |
Kenny Coogan |
TED-Ed
• April 2017
Read transcript
更多完整內容：http://ed.ted.com/lessons/why-are-sloths-so-slow-kenny-coogan 樹懶大部分時間都在吃、休息或睡覺。事實上，牠們一個星期只會從樹上下來一次，而且是去上廁所。這些生物到底為什麼麼會這麼沒幹勁？肯尼．庫根 (Kenny Coogan) 將為各位從生理及行為學的角度說明樹懶究竟為什麼可以這麼慢。
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biology
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