Also, not mentioned in the Snopes article, is that the refill cartridge and ink used in the pen weren't even developed specifically with NASA in mind. Fisher w

Also, not mentioned in the Snopes article, is that the refill cartridge and ink used in the pen weren't even developed specifically with NASA in mind. Fisher wanted to create a ballpoint pen that would work in all manner of extreme environments, write on wet surfaces, and work upside down. Microgravity was just one of those extreme environments.