人类的诞生地东非大裂谷，各地气候差异大，垂直高度差大，动植物多样性丰富。为什么北美动物多样性如此低，以致缺乏可驯化动物？

来源: thore 于 2024-11-19 03:14:53 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.