Evidence of life on Europa and Enceladus?

[popeyespappy]

Maybe not, but DNA recovered from the 15 million year old ice just above the liquid level of Antarctica's hidden Lake Vostok is good evidence that life is possible on the icy moons.

http://www.plosone.org/article/info%3Ado...67221-g003

The water in lake vostok is practically fresh, being mostly melt water from the glacier above.

I agree that lake Vostok is fresh water, but I believe that prevailing thought is the lake was there before the glacier above it formed.

The water under the ice cover of Europa and Enceladus would be to be highly enriched in inorganic minerals, and is likely to be quite acidic or basic. There is good chance DNA won't survive in the water in Europa and Encledus.

Lake Voctok results suggests life can exist in cold, low light, ice conditions. But there are a lot more hurdles life must overcome before it can survive in the likely water conditions on the ice moons.

Enriched like the environment around a hydrothermal vent?

Relative to the majority of the deep sea, the areas around submarine hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fluids. Chemosynthetic bacteria and archaea form the base of the food chain, supporting diverse organisms, including giant tube worms, clams, limpets and shrimp. Active hydrothermal vents are believed to exist on Jupiter's moon Europa, and ancient hydrothermal vents have been speculated to exist on Mars.

https://en.wikipedia.org/wiki/Hydrothermal_vent

I guess this means you don't care much for Iron–sulfur world theory?