Current sensor manufacturing methods involve building one sensor at a time and then combining them with other elements. They're relatively bulky and inefficient, and they tend to rely on mass spectrometers that have trouble spotting materials like methane and water. This new approach 3D-prints all the sensors and some of the circuitry on one substrate, and could detect those previously elusive substances.

The initiative is expected to take two years. If it works as planned, it could help future rovers find places that support (or once supported) life. They could also be used as safety systems that warn about changes to air conditions inside spacecraft and habitats. As small as this technology is, it could be vital for long-term space exploration.