Tree Nuts (IMAGE) University at Buffalo Caption A new study finds that large-nut-bearing trees may have been more abundant than expected near the historical sites of Native-American villages in Chautauqua County. Picture from left to right are hickory nuts (the palest); acorns from oak; black walnuts (dark, bumpy shells); and chestnuts (large and prickly). Credit Steve Tulowiecki Usage Restrictions This image may only be used in conjunction with news reports describing the related research. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.