Ball point pens
When NASA started sending astronauts into space they quickly discovered that ball-point pens would not work in zero gravity. To combat this problem, Congress approved a program and NASA scientists spent a decade and over $165 million developing a pen that writes in zero gravity, upside down, on almost any surface and at temperatures ranging from below freezing to over 300 C. The Russians used a pencil... Your taxes are due again in April
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