ice age

PULLMAN, Wash. – Researchers from Alaska and Washington state have found the earliest known evidence that Ice Age humans in North America used salmon as a food source, according to a paper published this week in the Proceedings of the National Academy of Sciences.

By E. Kirsten Peters, College of Agricultural, Human & Natural Resource Sciences PULLMAN, Wash. – From time to time I give public talks on climate change – those large scale changes geologists have been studying since the 1830s. At those talks I’m often asked a basic question about climate that, until now, has stumped scientists. […]