Optics Lesson
Refraction. ( http://en.wikipedia.org/wiki/Refraction )
A polar bear at the North Carolina State Zoo, Asheboro, NC, USA.
2009 Sept 13 13:45 EDT
2 responses
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Pascal Fellonneau said (14 Sep 2009):
absolutely wonderful, i'm jealous
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A F gave props (17 Sep 2009):
too cool
Also by george hess



