automatic irrigation filter

A friend sent me this story today. I thought it a perfect, concise example of how creativity can trump resources.

When NASA first started sending up astronauts, they quickly discovered that

ball-point pens would not work in zero gravity. To combat this problem,

NASA scientists spent a decade and $12 billion developing a pen that writes in

zero gravity, upside-down, on almost any surface including glass and at

temperatures ranging from below freezing to over 300 C. The Russians used a

pencil. Your taxes are due again - - enjoy paying them.

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