In many countries, urine was used as a detergent for washing.
17
When Heinz ketchup leaves the bottle, it travels at a rate of 25 miles per year.
127
Most of the dust underneath your bed is actually your own dead skin.
251
The "Cobra Effect" is where a solution for a problem actually makes the problem worse.
21
When glass breaks, the cracks move faster than 3,000 miles per hour.
47
If you get water flowing fast enough, it can cut metal.
354
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
The average cough comes out of your mouth at 60 miles per hour.
126