Why Is It?

Anti-Wrinkle Creams

April 13, 2004

How do anti-wrinkle creams work? (Retinoids and antioxidants increase collagen in skin.)

April 6, 2004

Why are sunsets so colorful? (Light is scattered by the atmosphere and by particles.)

March 18, 2004

Why do your ears pop during altitude changes? (Can't keep up with changing air pressure.)

March 16, 2004

rerun

March 11, 2004

rerun of #3151

March 9, 2004

rerun

March 4, 2004

rerun

February 26, 2004

rerun

February 24, 2004

Why is lather important when you wash? (Shows you the soap is working.)

February 19, 2004

Is hydrogen liberated when lightning strikes a body of water? (Probably not.)f