Studying rock samples from the western United States, scientists find ways to search for evidence of ancient and potential future life on Mars. The similarities between certain geological features in the deserts of the US west - like Utah - and specific sites identified within Martian craters show how life could persist underground on the Red Planet. The presence of organic material at such sites in Utah points to potential biosignatures to look for at Martian analogues. Furthermore, these findings underscore the importance of drilling or burrowing deeper during robotic and eventual human missions on Mars when attempting to find viable places where life may still hide below the harsh surface of the fourth planet from the Sun.