Old planets need companions too if they want to host life

August 2, 2014 2:55 AM

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Old planets need companions too if they want to host life

Older worlds with planetary companions may be the place to find the most ancient life in the galaxy, according to a new study. (Photo : Rory Barnes, University of Washington)

Alien life may evolve on planets with satellites far more often than on worlds lacking large companions in their solar system.

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