Sunday, November 20, 2011
Thankful Day #15
Thankful Day #15: I'm thankful for lenses. I'm looking through two of them, but the Assyrians invented the first one around 3000 years ago, probably to start fires with sunlight. Modern life would be almost unimaginable without eyeglasses, contact lenses, cameras, microscopes, telescopes, and the other uses of lenses in technology.
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