Millions of American women went on hormone therapy when it promised to protect against heart disease. Millions went off the pills when subsequent studies showed little protection and increased risk of breast cancer. New findings show the cancer danger from estrogen-progestin therapy may be even worse than first thought.

Researchers have long assumed that inheritance plays the biggest role in visible signs of aging. If your mother or father looks youthful well into middle age, chances are you will, too. Not necessarily, a new study suggests.