When NASA first started sending astronauts up, they quicky discovered that ball pens won't work in zero gravity. . To overcome this problem NASA spent a decade and 15 million dollars to develop a pen that writes in zero gravity,… — VincentGangte Copy Share Image
When NASA first started sending astronauts up, they quicky discovered that ball pens won't work in zero gravity. . To overcome this problem NASA… — VincentGangte Copy Share Image
