Roland Piquepaille writes "Researchers at NASA's Marshall Space Flight Center (MSFC) are using 'lab-on-a-chip' technology for medical testing and are customizing them to use in space to detect bacteria and life forms on other planets. These chips will also be used to protect astronauts aboard a spacecraft by detecting microbes and contaminants. These microarray diagnostic chips are very small. They also are inexpensive because they share the fabrication technology used to print circuits on computer chips. Therefore, a Martian expedition will be able to embark a very large number of these chips to secure the mission. More details and references are available in this overview, which includes a photograph of a NASA biochip."