NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
Only 8% of the world’s currency is physical money. The rest exists only on computers.
20
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
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
Americans are responsible for generating roughly 20% percent of the garbage in the world.
29
Speed dating was invented by a Rabbi in 1999.
45
There are 86,400 seconds in a day.
110
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170