送交者: xj 于 2005-5-11, 23:49:51:

进入美洲大陆和美洲上的大动物灭绝同时，估计全部被他们给灭了。

印第安人也没有驯化出牛等大动物。

• I have a similar question - boxer (344 bytes) 2005-5-12, 12:17:58
  • Human hunting is one of the prevailing hypothesis these days. - Latino2 (2248 bytes) 2005-5-12, 12:39:02
    • it is also possible that climate change and human expansion occured concurrently - xj (356 bytes) 2005-5-12, 12:57:39
      • True, without climate changes, human couldn't move to the virgin lands - Latino2 (166 bytes) 2005-5-12, 13:39:19
    • 那么动物之间的相互捕食会不会造成物种的灭绝? - boxer (116 bytes) 2005-5-12, 12:52:09
      • Human is a kind of animal on the very top of the food chain. - Latino2 (62 bytes) 2005-5-12, 13:24:14
• 南美没有大型动物可驯化，所以农业始终不发达。 - Latino2 (46 bytes) 2005-5-12, 11:14:46

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