A surprisingly small amount of light in your room may have detrimental effects, research suggests. ...

The holidays shouldn't drain your mental capacity or your bank account. ...

There’s an art to bidding your host adieu, even if you’re slipping out early. ...

Some people who have trouble waking up are turning to a new kind of sleep supplements. ...

The change represents a continued shift in the agency’s vaccine policy, reflecting increasingly skeptical views. ...

The latest report from the Gates Foundation predicts an alarming trend for the health of children around the world.   ...

"Things have not improved," writes Dr. Debra Houry, formerly of CDC. "They have worsened. And Congress has still failed to act." ...

A new study reports some unexpected results. ...

A word-for-word script for opting out of this year's festivities. ...

Here are the facts behind phosphorescence. ...