To boost mood and manliness, men are spending lots of money on the hormone testosterone—yet they may see trouble instead of ...

When you think of your penis shrinking, you might think of what happens after you’ve taken a cold shower or bath.

A new study reveals that a woman's chances of getting asthma are significantly impacted by their work shift schedule—a ...

Inside this double issue of SciAm, you’ll find black holes that burp up their stellar meals, metal detectorists that hit pay ...