When NASA started sending astronauts into space, they quickly discovered that ball-point pens would not work in zero gravity. To combat this problem, NASA scientists spent a decade and $12 million 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 300C.
The Russians used a pencil.
Your taxes are due again - hope you enjoyed paying them. :biggrin

