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鼠變象 要2400萬世代

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Uploaded by on Jan 31, 2012

哺乳類動物的體形會隨着生存環境而演化。澳洲進行生物學家研究化石紀錄後發現,當1億4千萬年前地球由恐龍統治的時代,不少動物體形都細如老鼠,恐龍滅絕後,牠們才爭取到­更多生存空間,因而體形逐漸變大,研究人員估計,體形小如老鼠要變到大象身型,要經過2,400萬個世代,逐漸變大。

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  • d蝗虫變到人咁大只係需要幾十年

  • 呢堂bio 竟然係出自applenews

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  • I dislike most apple daily videos. But I have to say this one is pretty well done. It's actually teaches something HK people needs to know.

    (but the tiny elephants are misleading)

  • 佢個恐龍時代個陣唔少動物好細..但係個粒小行星撞左個地球之後­好多都變大左.....而在冰河時期又有唔少動物.變細左  ...我唸到呢到...先發覺原來冷宿熱脹係可以用係生物到= =

  • 字幕尾二個字錯左

    

  • @00accelerator 錯啦 大氣中既氧合量  其實係由生物所造成[即係綠色植物放 氧氣] 地球本身唔係一開始就係21% 氧的

  • 無野食就唔會變大....衣家香港鬼禁多蝗蟲食曬d野,好快香港­人都無野食啦....香港人無得變大啦!!!!

  • 0:07 - 0:17 最好睇 xD

  • 超人迪加不是來自M78的!

  • 好搞笑

  • 2400快一倍係500!?

  • 唔係話大氣中既氧氣多,D生物就會變到大隻,有D就會變到好似蟲­蟲咁

    (之前睇電視睇到唔知有冇講錯)

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