Traces of marine plankton discovered attached to ISS outer hull

Russian scientists say they made a "unique" discovery while analyzing samples from the exterior of the International Space Station - traces of tiny sea creatures on the station's windows and walls. It remains unclear how marine plankton ended up in space.The results of the recent experiments prove that that some organisms are capable of living on the outer surface of the International Space Station (ISS), Vladimir Solovyev, head of the Russian segment of the ISS, has revealed. Some studies suggest that these organisms may even develop in the hostile conditions of spaceflight, which include vacuum, low temperatures, radiation and others, he added.