From LaughLab

LaughLab claims to help solve the enduring mysteries of laughter, like: What sort of jokes make children laugh and what does this tell us about the way in which they see the world? How do the differences between the sexes lead to men and women finding different jokes funny? Why do some jokes make lots of people laugh whilst others only appeal to certain types of people? What do the jokes that we find funny reveal about the way in which our brains work?

Basically, LaughLab claims to be a huge online experiment involving thousands of people from all over the world. According to its website, it is the largest scientific investigation into jokes, ever. The following are the "final findings" regarding the top jokes from different countries.

U.S.A.
A man and a friend are playing golf one day at their local golf course. One of the guys is about to chip onto the green when he sees a long funeral procession on the road next to the course. He stops in mid-swing, takes off his golf cap, closes his eyes, and bows down in prayer. His friend says: “Wow, that is the most thoughtful and touching thing I have ever seen. You truly are a kind man.” The man then replies: “Yeah, well we were married 35 years.”

CANADA
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 C. The Russians used a pencil.

AUSTRALIA
This woman rushed to see her doctor, looking very much worried and all strung out. She rattles off: “Doctor, take a look at me. When I woke up this morning, I looked at myself in the mirror and saw my hair all wiry and frazzled up, my skin was all wrinkled and pasty, my eyes were bloodshot and bugging out, and I had this corpse-like look on my face! What's WRONG with me, Doctor!?”
The doctor looks her over for a couple of minutes, then calmly says: “Well, I can tell you that there ain't nothing wrong with your eyesight....”

BELGIUM
Why do ducks have webbed feet?
To stamp out fires.
Why do elephants have flat feet?
To stamp out burning ducks.

GERMANY
A general noticed one of his soldiers behaving oddly. The soldier would pick up any piece of paper he found, frown and say: “That's not it” and put it down again. This went on for some time, until the general arranged to have the soldier psychologically tested. The psychologist concluded that the soldier was deranged, and wrote out his discharge from the army. The soldier picked it up, smiled and said: “That's it.”