Life's Little Mysteries: Science questions, answered

Are UFO sightings a 20th-century phenomena, or did people report seeing them earlier in history?

Some say bay leaves are full of flavor, others call them a fraud.

In terms of both absolute length and relative to body size, which living animal has the longest tail?

An astronomer describes how the moon's surface temperature changes.

How can DNA from a cheek swab determine if someone is closely related to you?

It's possible to compare some aspects of animal and human intelligence, but not all researchers like to.

Neuroscientists have identified the physical locations where memories are stored in the brain. But would that enable us to retrieve memories from someone who has died?

Why is one foot sometimes larger than the other?

For people who have been blind since birth, brain scans alone can't reveal if they dream in images.

Dangerous strains of E. coli bacteria can infiltrate the food supply through many different routes, experts explain.