Jordan Rosenfeld

The male sexual organ is more complicated than it might seem.

Taking in oxygen to power your whole body is just one part of your lung function. Altogether, your lungs are a highly efficient machine—and they do a lot more than you might think.

You can thank your butt for a number of physical actions you take every day: moving your hip and thigh during walking or running, rising from a sitting position, climbing, and even just standing upright.

New Year’s resolutions have a habit of being broken more than any other goals. This year, arm yourself with the best methods for making your resolutions a reality.

Body fat is not just something to get rid of. It plays important roles in the human body, from regulating metabolism to storing energy.

Not only is the liver your largest internal organ; it is in charge of hundreds of bodily processes ranging from fighting infection to manufacturing proteins and hormones to helping your blood clot.

It’s less than an inch in diameter.

René Descartes once described the pineal gland as “the principal seat of the soul.” Medical knowledge has vastly progressed since his time, though. Here’s what we know about this critical organ.