A subsurface ocean, an oxygen atmosphere and potential for life.
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Scientists believe that there is liquid water, under the crust of Europa.
Europa is the sixth moon of the planet Jupiter.
The moon scientist think might have life is Europa. It has oceans 3 to 60 miles under ice.
Silicate rock
Water
Europa is covered with ice and underneath a layer of ice there is an ocean that scientists think might have life living in it. Also Europa has many cracks on it.
They believe there is liquid water underneath its frozen surface. If there is liquid water on Europa, there might also be life.
The scientists think that Europa can have the life on it.
I think it might be Mars... or maybe Europa.
A saline ocean beneath it's crust.
As far was we know the development requires water in its liquid for to be present and a source of energy to supply/drive chemical reactions. We know that deep down Europa has a liquid layer (of water) and the geysers of this water into space proves that there is energy in Europa's core.