Why Is It?

20/20 Vision

April 3, 2001

Is it possible to have better than 20/20 vision? (yes, but it's limited by corneal aberrations)

March 8, 2001

Can DNA testing reveal your ethnic heritage? (yes and no-- it can reveal heritage if special markers …

February 27, 2001

Why do our cars spit out white steam before they're warmed up? (because when the car is relatively, …

February 22, 2001

Why does your stomach get upset when you're nervous? (tension in stomach muscle, just like you can …

February 20, 2001

Do dogs have a belly button? (yes, look for the hair whorl on his tummy)

February 15, 2001

Why does the hair on our body stand up in extreme cold? (Vestigial response from when humans had …

February 13, 2001

Why can you wake up coughing but not sneezing? (The histamine system shuts down.)

February 8, 2001

What medicinal value does menthol have? (Stimulates cold receptors to distract us from pain.)

February 6, 2001

What happened to vitamins F through I? (The old vitamin naming system was confusing.)

January 18, 2001

Can we fill up the ozone hole by transporting ozone up to the stratosphere? (No, not feasible)

January 16, 2001

Do ostriches really bury their heads in the sand? (No, they eat off the ground, so they might look …

January 11, 2001