因为喉咙结构有别正常人,因此一辈子不能发声,克曼加人为世界上唯一不会说话的民族!
从长相来看,克曼加人与其他南美洲印第安人没有任何区别,印第安人有数百个分支,他们属其中一个。
不会说话原因,科学家估计跟遗传基因有关。克曼加人用眼神手势交流,极少有人懂他们的沟通方式。
同时,科学家对克曼加人的舌头和口腔研究后发现,该族人的喉咙长得和常人不一样,声带的自然压缩部分不能发声讲话,致使他们只能用手势沟通。
全世界现在有约4万克曼加人,在18世纪时,他们的总数一度超过10万,目前是世界濒危的民族之一。
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