The Biological Oxidant and Life Detection (BOLD) is a concept mission to Mars focused on searching for evidence or biosignatures of microscopic life on Mars.[1][2][3][4] The BOLD mission objective would be to quantify the amount of hydrogen peroxide (H 2O 2) existing in the Martian soil and to test for processes typically associated with life. Six landing packages are projected to impact 'softly' on Mars that include a limited power supply, a set of oxidant and life detection experiments, and a transmitter, which is able to transmit information via an existing Mars orbiter back to Earth. The mission was first proposed in 2012.[5]