当大象过河时，总是将它的长鼻子当潜水通气管。澳大利亚的研究人员认为，现在的大象可能是从水中进化而来的。他们研究了一系列非洲大象的胚胎和胎儿后，发现它们具有与青娃、鱼和海牛等水族动物一样的主要特征。这些发现证实了“大象与儒艮、海牛是近亲”的假说。他们发表的 When the elephant crosses the river, always use its long nose as a snorkel. Researchers in Australia believe that elephants may have evolved from the water. After studying the embryos and fetuses of a series of African elephants, they found that they had the same main features as aquarium animals such as green babies, fish and manatees. These findings confirm the hypothesis that “elephants and dugongs, manatees are close relatives”. They published