"Dr. Richard Wiseman's LaughLab research resulted in a ranking of jokes from many countries" [here]. I liked the joke that the Canadians liked:

When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity. To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 Celsius.

The Russians used a pencil.

What's scary about this joke is that it might even be true.
10:57:42 AM