Killings of Vendors in Iraqi City Drive Alcohol Sales Off Streets

Two Drinks Can Kill Brain Cells in a Fetus, Studies Suggest

Despite F.D.A. Ban, Ephedra Won't Go Away

Could Chocolate Also Be Good for You?

Research in Italy Turns Up a New Form of Mad Cow Disease

Mad Cow Quandary: Making Animal Feed

Ban Urged on All Animal Protein for Cattle

Human Brains Examined for Clues About Mad Cow

Blood Transfusion Suspected in New Mad Cow Case in Britain

Specter of Cloning May Prove a Mirage

Cloning Creates Human Embryos

Medical and Ethical Issues Cloud Plans to Clone for Therapy

4 Indicted in a Steroid Scheme That Involved Top Pro Athletes

Student, 19, in Trial of New Antidepressant Commits Suicide