Mentally doing a task makes you better at it. Your mind can barely tell the difference.
18
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
Seaweed can grow up to 12 inches per day!
59
If you dropped an aerodynamic object (such as a bullet) from the Empire State Building, you could kill someone.
132
Less than 3% of the water produced at a large municipal water treatment plant is used for drinking purposes!
24
The face of a penny can hold about thirty drops of water.
85
The yin-yang pattern's earliest use is in Rome - not China!
125