Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Any domino can knock over another object up to 1.5x its size. The 32nd object would be big enough to knock over the Empire State Building.
18
Oak trees can live 200 or more years.
61
The strangers in your dreams are actually people that you've seen in real life.
50
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
The small pocket in the larger pocket of your jeans was designed for pocket watches.
11
The average American uses eight times as much fuel energy as an average person anywhere else in the world.
28
Couples' personalities converge over time to make partners more and more similar.
235