Life's Little Mysteries

High-speed cameras and arrays of microphones helped researchers draw an acoustic map of hummingbirds' distinctive hum.

It's probably fine to give your child weak coffee, as long as you skip the sugar.

It could have been a fig, grapes, citron, a pomegranate or even wheat.

Coyotes originated in prairies and deserts, but are now right at home in big cities across North America. How did this naturally shy creature learn to thrive in crowded urban landscapes?

The most important thing we've communicated? That we exist.

Space junk moves at 10 times the speed of a bullet from an average gun.

What prompts this lightning-like energy in pets?

Sure, one baby's tough. But what about two or more?

The animal with the largest ears relative to body size is actually quite tiny.

It's almost impossible to argue that gasoline-powered cars are better for the environment.

Schisms within the church have led to more and more denominations over the millennia.

Desert temperatures can fluctuate greatly between day and night, due to the poor heat-retaining properties of sand and a lack of humidity.

Trends, set by royals and movies, help to influence a dog breed's popularity.

Why do people breathe so loudly when they're asleep?

Do you need to exercise extra moderation with the champagne this Valentine's Day?

To scare off the queen's enemies.

The rubber pencil illusion works because our brain can't keep up.

The Amazons were fierce female warriors of ancient Greek mythology, but did they really exist?