PREVIEW: MEDICINE: Conversation with geneticist Christopher Mason, author of "The Next 500 Years," explains the compiling of a database on the effects of space travel on humans. More later.

Jul 19, 07:55 PM

PREVIEW: MEDICINE: Conversation with geneticist Christopher Mason, author of "The Next 500 Years," explains the compiling of a database on the effects of space travel on humans. More later.

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PREVIEW: NASA: Conversation with Bob Zimmerman re: a NASA lunar lander over budget, overdue, and out of proportion -- and what is to be done? More tonight.
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