Diamonds mined in Brazil are harder than those found in Africa.
40
Speed dating was invented by a Rabbi in 1999.
45
More than 50% of Americans fall asleep on their sides.
86
Passengers on the Beijing subway can pay with plastic bottles.
29
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
No matter its size or thickness, no piece of paper can be folded in half more than 8 times.
-64
One human hair can support 3 ounces.
191