What they found was the new strain of
Bacillus pumilus, a unique, highly motile Gram - positive bacterium capable of colonizing the mung bean plant without causing any harm.
A 2003 survey found a particularly stubborn strain of the rod - shaped bacteria
Bacillus pumilus in even the cleanest of clean rooms at NASA's Jet Propulsion Laboratory in Pasadena, California, where Mars - bound spacecraft are assembled.