Slimy snot is an important part of how your immune system wards off germs and fights back from infection.

Ghosts can be spooky fun, but there’s no evidence they exist.

Up to 50% of US teens feel they are addicted to their devices. But help is out there.

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.

An aerospace engineer explains why it’s so hard to tell just how fast an airplane is really moving.

A pediatric urologist explains how the bladder and the brain communicate to wake you up when you need to ‘go’ – and how that communication might break down.

Animals often give birth to litters of more than one offspring at a time. But are those babies twins?

Flies often beat out competitors for food because of their specialized sensing organs called antennae.

Recent research suggests blood vessels are the key to why fingers and toes turn pruny and pale after being submerged for a while.