The chance of ET life is 1
Shame not everyone else agrees eh!
It is an interesting discovery but at the same time plenty of scientists have known for a long time that the "essential ingredients" for life just arent essential. Life can survive without water, sunlight, heat, atmosphere and food. Granted some of the life becomes dormant, i cant remember the species in question but there are life forms which can "hibernate" through drought, extreme cold (minus degrees and in solid ice), the vacuum of space, extreme radiation and lack of food, and these bacteria and micro organisms can stay this way for, it seems, a very long time.
I think we need to realise that life on earth IS unique, but it isnt alone. Every world will have different environments but that doesnt mean life cant exist there.
On a related note another group of scientists discovered lots more red (or was it brown...) dwarves, tripling the potential number of stars in the universe and since if a planet is close enough to such a dim star it can be in the goldilocks zone that means an increase in the number of habitable planets that could exist, couple that with this new bacteria and the universe looks full of life!
The chance of extraterrestial life just increased highly.