Why Is It?

Slimy Frog Skin

March 14, 2011

A listener asks: Why is frog skin slimy?

March 10, 2011

Astronomers calculate the distance to the furthest stars by comparing them to stars they know.

March 1, 2011

A listener asks whether it's safe to eat fruit seeds and pits.

October 21, 2010

Why you sometimes feel a cold coming on, only to have the symptoms disappear the next day.

October 12, 2010

If water droplets are clear, why do the clouds that form from them appear white?

October 6, 2010

A listener asks why clouds have such well-defined edges.

September 29, 2010

Some people think microwave ovens and cell phones are dangerous, but their fears are not backed up …

September 14, 2010

A listener asks: Why do pigeons bob their heads back and forth when they walk?

September 8, 2010

A listener asks what the numbers on a bottle of motor oil mean.