In a pooled analysis, researchers found that one type of vitamin D accounts for most of the reduction in fracture risk.

One-quarter of all deaths from tuberculosis are in patients also infected with the AIDS virus, a new report says.

To the Editor:.

To the Editor:.

To the Editor:.

To the Editor:.

My mother used to tell me that the white stuff sticking to orange segments was good for me. Is it?

Two books that delve into the realm of awful headaches, sometimes with no escape.

In a bedside companion, a human story beyond illness and treatment.

Is one gender more likely to suffer from the classic symptoms of chest pain and shortness of breath prior to a heart attack?

A product relatively unchanged for two centuries is being tweaked to reduce emissions of carbon dioxide.

Scientists describe a well-preserved and practically complete fish fossil that is 418 million years old.

Dee Boersma, a University of Washington conservation biologist, is the Jane Goodall of penguins.

Researchers have found that protein levels can change, altering ant behavior.

A procedure for heart failure had once seemed promising, but does not seem to help patients, doctors report.

With a bit of reasoning (and a cocktail napkin), you too can crack math’s imponderables.

What’s a woman to do when her libido drops?

Some people who have long fought to clear-cut forests in the Northwest are trying to reposition themselves for a more environmentally friendly economy.

Treasure-hunting for the satellite-savvy, socially networked set.

The meetings will seek to resolve longstanding issues that have blocked the development of an international climate treaty.