When glass breaks, the cracks move faster than 3,000 miles per hour.
47
Each year, more than 50,000 people are injured by jewelry in the U.S.
29
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
Chrysler built B-29's that bombed Japan, Mitsubishi built Zeros that tried to shoot them down. Both companies now build cars in a joint plant called Diamond Star.
29
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
More than 10% of the world's salt is used to de-ice American roads.
54
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
25
If you had 10 billion $1 notes and spent one every second of every day, it would require 317 years for you to go broke.
109