Tickling can make you laugh and squirm, but why? Here's the science behind knismesis and gargalesis, and why you can't tickle yourself.

The search for extraterrestrial life kicked off in the 1960s. The Kardashev Scale helps researchers figure out just how detectable that life might be.

Clinical psychologist Krystal Lewis shares effective techniques for calming an anxiety attack.

Hyperacusis is a rare condition that makes everyday sounds unbearable. Find out who is at risk and how it is treated.

Learn why attention deficit hyperactivity disorder starts in childhood, but some people don’t outgrow it.

Step away from the peeler, or you’ll be tossing out a lot of valuable nutrients.

Advanced age is a risk factor for blindness, but there’s a lot you can do to protect your vision before it’s too late.

Sean D. Hollis, a specialist in brain injury explains why we have memory loss and other symptoms of a concussion and provides helpful recovery tips.

Embracing old age can bring many benefits and rewards. And if you’re still young, it might surprise you to learn that getting old isn’t all bad.