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On Thursday, just over three years after Mr. Kelly, 55, returned to Earth, NASA researchers reported that his body experienced a vast number of changes while in orbit. DNA mutated in some of his cells. His immune system produced a host of new signals. His microbiome gained new species of bacteria.Many of these biological changes seemed harmless, disappearing after he returned to Earth. But others — including genetic mutations and, after his return, declines in cognitive test scores — did not correct themselves, provoking concern among scientists.
Oh Scheiße, das ist ja ein fieser Rückschlag. Welcher Nerd will unter solchen Umständen noch ins All?!