"Some rocks exposed to the sun for a very long time turn dark."
Exactly which rocks would they be? Most rock does exactly the opposite. As the surface of a rock is exposed to oxygen and freeze-thaw cycles, it begins to crumble at a microscopic level, which causes it to appear to 'bleach.'
11 posted on 06/30/2006 8:37:03 AM PDT by editor-surveyor
(Atheist and Fool are synonyms; Evolution is where fools hide from the sunrise)
