When NASA first started sending astronauts into space, they realized that the ballpoint pen would not work at zero gravity so…
A million dollars later and two years of tests resulted in a pen that could write in space, upside down, on almost any surface temperature ranging from below freezing.

When confronted with the same problem, the Russians used a pencil.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
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