【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。
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