"(phys.org May 30, 2012) A discovery about the make-up of the atmosphere of Mars could help inform future missions searching for life there.
Scientists have tried to find out how the planet's environment came to contain methane gas, which contains carbon – a substance found in all living things.
They found that meteorites, which continually bombard the surface of Mars, contain enough carbon compounds to generate methane when they are exposed to sunlight.
Researchers say their findings give valuable insights into the planet's atmosphere. Scientists planning future missions to Mars could use the findings to fine-tune their experiments, potentially making their trips more valuable..."