Diamonds mined in Brazil are harder than those found in Africa.
40
One human hair can support 3 ounces.
191
Passengers on the Beijing subway can pay with plastic bottles.
29
The chances of making two holes-in-one in a round of golf are one in 67 million.
67
Speed dating was invented by a Rabbi in 1999.
45
Couples' personalities converge over time to make partners more and more similar.
235
In Tokyo, a bicycle is faster than a car for most trips of less than 50 minutes!
58
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45