Quote:
Originally Posted by SameOldStory
Government joke.
When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity. To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil. 
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Funny, but not true. It's been posted before. NASA did develop a zero-G pen, but had the Russians used a pencil, the graphite debris floating around their craft would have posed a danger to the delicate electronic controls. Snopes, I believe, did an article about it.