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Modafinil has been approved for treatment of narcolepsy, but it's often used to improve mental performance. The question is, does it work? A new study says probably not.

Time is almost up for consumers to tell the FDA what "natural" food means. It's an ancient philosophical question with no easy answers.

Two individuals have been flown out of the South Pole in the dead of Antarctic winter. It's only the third such evacuation ever conducted.

Beyond pesky, mosquitoes kill hundreds of thousands of people worldwide each year. And the bites aren't random. A mouth packed with sensors, drills, spears and straws guides the bug to blood.

Scientists at the Sanford Burnham Prebys Medical Discovery Institute in La Jolla said their study "provides critical insight on a paramount issue in HIV research."

Beyond pesky, mosquitoes kill hundreds of thousands of people worldwide each year. And the bites aren't random. A mouth packed with sensors, drills, spears and straws guides the bug to blood.

The British are very specific about how they take their tea: black, with milk and sugar. But steeping the optimal cup requires a surprising amount of chemistry. Here's a guide to the science.

Emergency room doctors are just beginning to study a new kind of casualty in the opioid epidemic — patients who survive an overdose, but walk away with brain damage, kidney failure or dead muscle.

The British are very specific about how they take their tea: black, with milk and sugar. But steeping the optimal cup requires a surprising amount of chemistry. Here's a guide to the science.

The political activist's fierce opposition to the Equal Rights Amendment is widely credited with its failure to be ratified. Schlafly long championed conservative causes and founded the Eagle Forum.