Jul. 11, 2008
Mars has water ice in its soil -- and could Mercury be shrinking? In this segment, we'll get the latest from around the solar system, checking in with scientists on both the Mars Phoenix and Mercury Messenger space missions.
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From the Vault
Ira Asks: How Do They Make Eyeglasses?
You deliver your prescription to an optician, and they return with a pair of eyeglass lenses tailored precisely to your personal vision quirks. But how?