Hmmm.....

It is interesting to note that about 12,500 years ago, sea-level rose by several hundred feet as rainfall increased dramatically, often as monsoons ( IE 40 days and 40 nights of constant rain).

Around this same time period, 60% of large land animals became extinct.

In fact, the only large Pleistocene Mega-Fauna that survived, in anything like Pleistocene numbers, are the ones we domesticated through selective breeding (IE took two by two).

see:

Budiansky, Stephen, 
The Covenant of the Wild: Why Animals Chose Domestication. 
New York: William Morrow & Co., Inc., 1992. 
    Explains the role of neoteny (domestication) in the Neolithic Revolution 
    and how it was as much a biological as a technological evolution. 
 
Ray Audette
NeanderThin