If a little kid ever asks you just why the sky is blue, you look him or her right in the eye and say, 'It's because of quantum effects involving Rayleigh scattering combined with a lack of violet photon receptors in our retinae.'
Phil PlaitSometimes, even by accident, the universe makes beauty, and we can stand back in awe of it. Even better - we can figure out why. Science! I love this stuff.
Phil PlaitPseudoscience is like a virus. At low levels, it's no big deal, but when it reaches a certain threshold it becomes sickening.
Phil Plait