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Did Comets Spark Alien Life in Europa's Oceans?

It's a virtual certainty that comets have delivered the building blocks of life to Europa's hidden ocean, according to a new study.

Published On 10/14/2015
2:00 PM EDT
Could the surface features in Europa's crust reveal where comets have impacted and penetrated through the ice? | NASA/JPL-Caltech/SETI Institute