Methane murmurs of Martian microbes

NASA scientist Carol Stoker and Larry Lemke told officials that they have the strongest evidence yet of life on Mars. The presence of telltale methane signatures strongly suggest that microbial life could still exist on the red planet tucked away in watery niches among rocks and caves. Fluctuations in the methane signatures observed from the ground and by the European Space Agency's Mars Express hint at an active underground biosphere not unlike that found in Spain's Rio Tinto region where acidic hot springs harbor life despite the extreme conditions. The researchers hope to publish their results in a forthcoming issue of the journal Nature.