Tyler Santora

Painting your nails is generally considered safe, but the practice does carry a few health concerns that scientists don't fully understand yet.

Gum is full of non-food items, like resins, emulsifiers and softeners. So what happens when we swallow a piece?

People can stay in comas for weeks, months or even years. But what causes some of these patients to "wake up"?

Ultraviolet has very short and energetic wavelengths that are shorter than violet on the visible spectrum. But can people see UV?

Lab research often gives one answer about whether smiling can make you feel happier, but does that translate to the real world?

Snakes have anatomy that helps them hear, you just can't see it when they slither by.

There are a few possibilities for why small dogs can be so menacing.

Pets often run around in random bursts of speed, an activity called frenetic random activity periods, or FRAPs. But why do they do it?

The disease malaria appears to have influenced blood type prevalence.

Different ants emit different smells. Here's why.

Here's why your cat or dog might be rubbing its butt on the floor.

Here's what it's like inside a kangaroo's pouch, where joeys can live for up to one year.

Here's why wisdom teeth usually don't come in until the ages of 17 to 21.

Can rabbits grow horns, as the legendary jackalope does?

Here are some theories as to why cold air helps get rid of nausea.

Here's why back pain is so universal among our species.

Most people do not breathe equally from both nostrils and tend to have a dominant side.

Grinding our teeth damages them, so why do we do it?

Societies have lived underground before, sometimes for weeks at a time.

Here's the highest temperature and humidity level that people can tolerate.

Women tend to outlive men because of biological and social factors.

Why do humans blink so much?

Can animals that live in the water suffocate?

What role do our eyebrows and eyelashes play?

Why aren't humans covered in dark, scruffy body hair, like apes are?