Tuesday, November 28, 2006

Blue and Green

Water is blue, right? True, except when it's green. Or when it's a frothy white. But actually, water has no color at all. The colors are all reflections and refractions and absorptions and impurities and highlights and shadows. 75% of our earth is covered with water; it's what makes our little blue ball of a planet unique--so far as we know.

Put this cross on a mug!

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