There's been a news article around claiming that cosmonauts have found sea plankton on the outside of the international space station, for example here. Is there any substance to this claim? Have any papers been published about it? Is there any public documentation of the EVA when the sampling was taken and the whole project which must have preceded and followed it?
A Russian official claims that samples collected by cosmonauts show evidence of sea plankton on the outside of the International Space Station, news agencies are reporting.