When NASA started sending up astronauts, they quickly discovered that ballpoint pens would not work at zero gravity. To combat the problem, NASA scientists spent a decade and $12 billion developing a pen that wrote at zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300C. ......................The Russians used a pencil.
Posted on: Fri, 20 Sep 2013 14:07:16 +0000
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