These giant animals shared the planet with humans less than 20,000 years
 ago. And it's humans with their mammoth-steak barbecues that likely wiped
 them out, according to Tim Flannery, a mammalogist and paleontologist who
 is the director of the South Australian Museum. He is the author, most
 recently, of "The Eternal Frontier: An Ecological History of North America
 and Its Peoples,"

 http://salon.com/people/feature/2002/03/07/megafauna/index.html

 ( http://www.amazon.com/exec/obidos/ASIN/0871137895/104-4640197-1447125 }

Philip Thrift
http://www.geocities.com/paleofitness