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Stories about: cosmonauts

A Man Invented a Ballpoint Pen to Write Upside Down, NASA Took It to Space
A Man Invented a Ballpoint Pen to Write Upside Down, NASA Took It to Space

29 Aug 2021, 09:42 UTC · By: Tudor Serban / After Paul Fisher invented the first universal ink cartridge refill, he tried to do something more and put some nitrogen and a piston inside