Humans Exonerated in Mammoth Extinction

Genetic studies show:

"'The population was split into two groups, then one of the groups died out 45,000 years ago, long before the first humans began to appear in the region,' said Stephan C. Schuster, associate professor of biochemistry and molecular biology at Penn State University and a leader of the research team. 'This discovery is particularly interesting because it rules out human hunting as a contributing factor, leaving climate change and disease as the most probable causes of extinction.'"