I don't know and I don't care. Everything that included humans happened in the last 10000 years. I believe that the Earth is old (4.5 billion or whatever the hell they say it is), so yea look at me I'm smart.
English
-
Its actually way more than that, since the last ice age ended 10,000 years ago and we were pretty much the cause of the extinction of mammoths, meaning we mist have had time to develop tools and strategies for hunting.