Posted: Sep 05, 2012 1:21 pm
Here's something that spun my brain; photons are invisible. If you could see photons, you wouldn't be able to see much else.
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=1455640#p1455640