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Supernovae Blamed For 2 Of Earth’s Mass Extinctions, The Devonian And Ordovician
Two of Earth’s five confirmed mass extinction events could have been caused by nearby supernova explosions stripping the ...
Sunita Williams becomes the second astronaut to spend the longest time in space – who holds the record?
NASA astronaut Sunita Williams has spent 608 days in space, making her the second longest-time astronaut in history. But who holds the record for the most time in space? Find out here!