Life on Earth evolved about 3.8 billion years ago as a result of cosmic coincidence. But is life on our planet really unique in the universe? Current findings from a salt lake in California and a salt mine in Austria contain salt structures that resemble those on Mars. The most spectacular discovery is that, that are 250 million year-old microorganisms were found locked in the salt. It?s possible that scientists could one day bring them back to life again. Will an expedition to Mars find proof of these miniscule creatures on the red planet?