Life's Little Mysteries: Science questions, answered

Pilots have been doing barrel rolls in small planes throughout the history of aviation. But has anyone ever attempted this maneuver in a commercial airliner?

On a clear day, sometimes a green flash appears with the sun on the horizon just after sunset or before sunrise. But why does this happen?

Do galaxies, including our own Milky Way, orbit anything in the universe?

It's well known that earthquakes can rock fault-filled places like the U.S. West Coast. But why do earthquakes happen in the middle of tectonic plates?

Spacecraft have visited and photographed the far side of the moon, but why can't we see it from Earth?

Infinite mirrors are a fun party trick, but the physics behind this phenomenon explains why it may not be true.

The simple question of "why five" has puzzled scientists from multiple fields, and the answer still isn't entirely clear.

And like dogs, why do cats also sniff fellow felines' behinds?

Cats are masters of contortion — and the laws of physics — which helps them stick the landing more times than not.

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