Last week, Newt Gingrich stirred up some controversy when he said that, as president, he would okay plans for NASA to go back to the moon and build a base there. Today on KTRS/St. Louis, I asked astronomer Phil Plait whether the concept was practical, from whether we can afford it to what it would do to NASA’s budget to the bigger questions of what we’d do once we were set up on the moon and how we could build a habitat that would sustain human life.

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