Lol, just thought the subject line read ambiguously.
One kinda wild thought - humans might have had some effect on Co2 levels even back then.
I'm thinking of the burning of Australia, which happened over a fairly short time. I've read (not sure how speculative it was) that the first Australians hunted by starting fires to flush potential prey out of the foliage. According to this, most of Australia was fairly lush before humans arrived, but became largely desert over the next few thousand or tens of thousands of years.
The timing is probably off, though, since this would have begun over 50,000 years ago... but the same technique may have been used in the Americas, which could have had an impact.
- shikantaza 2012-04-06 10:45:02 (73 views)
- underdog 2012-04-07 15:28:12 (83 views)
- underdog 2012-04-09 19:04:48 (37 views)
