There is an ocean on Europa which contains liquid water. Other than the Earth, Europa is the only place in the solar system where we have found liquid water. Life as we know it is very dependent upon liquid water, and life is believed to have originally evolved in the water, before moving to the land.
The scientists think that Europa can have the life on it.
There may be life under Europa's vast oceans. It is cold, but heat from the moon's core and Jupiter's magnetic field may make it habitable for organisms under the ice.
I have read somewhere that scientists think that europa may have an underground ocean.
Icy Caps
An icy surface.
They may have life.
A thick layer of ice
Scientists believe that there is liquid water, under the crust of Europa.
Europa - a moon of Jupiter.
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.
Scientists belive that Europa has a layer of water beneth is icy crust, which could potentially harbour simple life forms.