http://www.cnn.com/2001/TECH/science/06/13/humans.overkill.reut/index.html
John Alroy, an evolutionary biologist at the University of California at Santa Barbara, used a complicated computer model to simulate what may have happened when humans first entered North America some 13,400 years ago over an Ice Age land bridge from Asia. Regardless of the variables he plugged in, the presence of human hunters triggered mass extinctions.
John Alroy, an evolutionary biologist at the University of California at Santa Barbara, used a complicated computer model to simulate what may have happened when humans first entered North America some 13,400 years ago over an Ice Age land bridge from Asia. Regardless of the variables he plugged in, the presence of human hunters triggered mass extinctions.