Galileo detected patterns in the moon's internal magnetic field that strongly indicated the presence of a salty ocean. The results were reported in the journal Science by a team of planetary physicists at the University of California, Los Angeles. They concluded that there could be a salty ocean about seven and a half kilometres below the moon's surface. However, the scientists cannot tell if the water is definitely salty or not, and they cannot be completely certain that an ocean actually exists. But the new evidence suggests that if there were an ocean, it would be a good place to look for signs of rudimentary life on Europa.
Water is a very hospitable environment for the formation of life.
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