WASHINGTON, June 4 (UPI) -- U.S. scientists have determined a link between climate change and the origins of maize and squash cultivation in Mexico.

TALLAHASSEE, Fla., April 10 (UPI) -- U.S. anthropologists have found evidence of ancient maize farming in the Gulf Coast region near Tabasco, Mexico.

WASHINGTON, Aug. 5 (UPI) -- Archaeologists have found evidence that humans in what is now Israel were grinding grains into flour thousands of years before the first farming.

A substance derived from shark livers seems to promote weight loss with few side effects, glassy microfossils offer clues to early plant domestication, and other news from the frontiers of scientific research.