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牙齒不夠用　科學家研究無止盡長牙
Jul 3rd 2013, 17:00

【綜合報導】英國薛菲爾德大學(University of Sheffield)研究人員表示，隨著人類壽命越來越長，以及現代的飲食習慣，人類最多只能長出32顆牙，已經無法合乎需求，他們正研究如何讓人類無止盡長牙的方式，如果人類可以無止盡長牙的話，研究人員表示屆時人類的嘴巴，還有可能演化成像河豚的喙狀嘴。
 
研究人員分離出讓魚類可無止盡長牙的細胞，藉以研究如何複製到人類身上，研究人員相信，讓人類可以沒有限制長牙，將是解決各種牙齒問題，更實際的做法。

研究人員相信人類嘴巴有可能演化成喙狀嘴。翻攝網路

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