Moths with high-contrast markings like zebra stripes are harder to detect, at least at first, than those with background-matching camouflage.
Surveys show that 30 percent of people do not wash their hands after going to the bathroom, which exposes others to germs and infections.
Gut bacteria not only help digest food, they also signal to our brain that we've eaten enough.
Fake smiles and real smiles are controlled by two different parts of the brain.
A small crustacean called Daphnia provides evidence that larger eye size yields a reproductive advantage.
Clouds weigh several tons but stay airy by distributing their weight over a large area.
How does this ping pong ball float in mid-air? Bernoulli's Principle.
Bradycardia is a below average heart rate, slower than 60 beats per minute.
Ancient poop reveals that Romans suffered from intestinal parasites, despite their sophisticated sanitation system.
Scientists tackle this mystery: Why do mountains rise but never get any taller?