When
NASA first started sending up astronauts, they quickly discovered that ballpoint 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, underwater, on almost any surface including glass and at temperatures ranging from below freezing to over 300C.
and they came up with this wonderful invention
:
The Russians used a pencil.
*jian gui le
*
Moral of the story:
Don't be so complicated. Most of times,something simple would do".
Originally posted by DevilAngel77:as long as can fulfill purpose, can liao...