Elizabeth Cohen is CNN’s medical reporter. She has been following the Senate hearings on mad cow disease (bovine spongiform encephalopathy – BSE) and the safety of America’s food supply.

Cohen was seen shaking his head subtly. "You are a sick and twisted individual with an incurable disease," the young man who is nearly 20-years-old said. "You preyed upon innocent, innocent young ...

Researchers at Bar-Ilan University reveal protein changes linked to longevity throughout mammalian evolution. Over the past ...