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Thanks to LouisG for sharing this joke with us.
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 $1.2 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 Celsius. Confronted with the same problem the Israelis used a pencil.
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