Science starts to unlock secrets of asteroid Bennu
New studies point to the building blocks of life in the early solar system.
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Bennu samples brought back by a University of Arizona-led space mission contain the key ingredients of life and signs of the stew needed to mix them.
Three Tucson scientists are featured in "Planetary Defenders," a new NASA documentary that premieres Wednesday about the effort to track and possibly deflect asteroids endangering Earth.
