Yawns are more contagious among people with closer relationships.
163
A Native American tribe in South Dakota collects bottle caps left by campers, using them as currency. Several banks in the area now recognize the caps as legal tender.
225
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Aztecs were the first to serve chocolate as a drink. They also mixed it with hot chili pepper to make it really 'hot'.
13
Sony researchers have developed a refrigerator that only opens when you smile.
9
Drying your hands with paper towel will reduce the bacterial count by 45 - 60% on your hands. However, using a hand dryer will increase the bacteria on your hands by up to 255% because it blows out bacteria already living in the, conveniently, warm moist environment.
26
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12