Jon Hamilton

For six years now, life has been really good for James. He has a great job as the creative director of an advertising firm in New York City. He enjoys spending time with his wife and kids.

And it has all been possible, he says, because for the past six years he has been taking a drug called ketamine.

For the first time, the U.S. military is speaking publicly about what it's doing to address potential health risks to troops who operate certain powerful shoulder-mounted weapons.

These bazooka-like weapons produce forceful explosions just inches from the operator's head.

A new application of artificial intelligence could help researchers solve medical mysteries ranging from cancer to Alzheimer's.

It's a 3D model of a living human cell that lets scientists study the interior structures of a cell even when they can only see the exterior and the nucleus — the largest structure in a cell. The model was unveiled to the public Wednesday by the Allen Institute for Cell Science in Seattle.

Military personnel may be endangering their own brains when they operate certain shoulder-fired weapons, according to an Army-commissioned report released Monday.

The report, from the Center for a New American Security, says these bazooka-like weapons pose a hazard because they are powered by an explosion just inches from the operator's head.

The words "dog" and "fog" sound pretty similar. Yet even a preschooler knows whether you're talking about a puppy or the weather.

Now scientists at Georgetown University Medical Center in Washington, D.C., have identified a two-step process that helps our brains learn to first recognize, then categorize new sounds even when the differences are subtle.

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