Tuesday, June 29, 2010

The sun is so dense that it is incredibly difficult for sunlight to work its way out from the center of the sun, where it is made by nuclear reactions. If sunlight could fly in a straight line unhindered it would take just 2 seconds to reach the surface. In fact, it follows such a tortuous drunkard’s zigzag path that it takes about 30,000 years. Feel today’s sunlight on your face. It was made at the height of the last Ice Age.
- Marcus Chown

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