Friday, April 2, 2010

Three Horizons

If you're standing on the edge of the beach, the ocean looks enormous, as if it stretches off forever. However, because of the Earth's curvature, the horizon is only three miles away (a little farther, if you're wearing platform shoes, or stilts and a clown costume). You can really only see a very small amount of the ocean. The Pacific Ocean, for example, is roughly nine thousand miles across.
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