A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
You share your birthday with at least 9 million other people in the world.
205
It is impossible to hum if your nose is plugged.
366
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
160 cars can drive side by side on the Monumental Axis in Brazil, the world's widest road.
39
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
The strangers in your dreams are actually people that you've seen in real life.
50
Speed dating was invented by a Rabbi in 1999.
45