New bacteria lurking on ISS no space oddity, says scientist

New species were discovered in the International Space Station - but they probably didn't come from outer space

Four species of bacteria - three of them previously unknown to science - have been discovered onboard the International Space Station (ISS), begging questions about how they got there, and how they have managed to survive.

Their discovery may also bolster future efforts to cultivate crops during long spaceflight missions, since related species are known to promote the growth of plants and help them fight off pathogens.