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Methane, a potential sign of primitive life, has been found in meteorites from Mars, adding weight to the idea that life could live off methane on the Red Planet, researchers say.
This discovery is not evidence that life exists, or has ever existed, on Mars, the researchers cautioned. Still, methane "is an ingredient that could potentially support microbial activity in the Red Planet," study lead author Nigel Blamey, a geochemist at Brock University in St. Catharines, Ontario, Canada, told Space.com.
Researchers have discovered a possible new species of bacteria that survives by producing and 'breathing' its own oxygen. The finding suggests that some microbes could have thrived without oxygen-producing plants on the early Earth and on other planets by using their own oxygen to garner energy from methane
originally posted by: wildespace
I wonder how far we can stretch this "suggests possibility of life" tagline. Methane has some relation to life, but it could equally be absolutely unconnected with life.
One could say that the existence of a planet, by itself, suggests possibility of life.