During the heat of the space race in the 1960s, the US National Aeronautics and Space Administration decided it needed a ball point pen to write in the zero gravity confines of its space capsules.
After considerable research and development, the Astronaut Pen was developed at a cost of $1 million.
The pen worked and also enjoyed some modest success as a novelty item back here on Earth.
The Soviet Union, faced with the same problem of writing in zero gravity, used a pencil.
