NASA will begin a major new search for life on other planets this week when it launches the $420-million Jet Propulsion Laboratory/Lockheed Martin Phoenix Mars lander.rnPlanned for a predawn liftoff Aug. 3 on a Delta II, Phoenix is the first mission since the Viking landers 30 years ago to carry hardware specifically devoted to detecting life's clues beyond Earth (AW&ST June 11, p. 56).
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