Environmental change is the selective force that preserves adaptive traits in organisms and is a primary driver of evolution.

In addition to providing fundamental insights into the early evolution of the estrogen receptor, research by a team at the University of California, San Diego School of Medicine may lead to a contraceptive for female lampreys

The U.S. Food and Drug Administration is warning about the sale or consumption of certain imported ungutted, salt-cured alewives fish from Canada. The FDA said the fish -- also called gaspereaux fish -- were imported from Michel & Charles LeBlanc Fisheries Ltd.

By KEVIN MILLER; OF THE NEWS STAFF In fall 2000, state officials and some of Maine's business leaders were up in arms about a federal decision to list Atlantic salmon in eight Maine rivers as endangered species.

OFF ATWATER BEACH, Wis. _ This place should be an underwater desert. But as the trio of researchers wearing scuba tanks and lead weights drops through the water, the landscape of rounded stones 30 feet below is disturbingly full of strange, new life.