Valery Polyakov took the longest-ever spaceflight, clocking up 437 continuous days in the 1990s.
from BBC News - World https://ift.tt/Qc1ovqD
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Valery Polyakov took the longest-ever spaceflight, clocking up 437 continuous days in the 1990s.
from BBC News - World https://ift.tt/Qc1ovqD
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