NASA's Clean Rooms Aren't

In NASAs Sterile Areas, Plenty of Robust Bacteria, NY Times

“Researchers have found a surprising diversity of hardy bacteria in a seemingly unlikely place the so-called sterile clean rooms where NASA assembles its spacecraft and prepares them for launching. The findings are significant, the researchers report, because they can help reduce the chances of stowaway microbes contaminating planets and other bodies visited by the spacecraft and confounding efforts to discover new life elsewhere.”