There are more telephones than people in Washington, D.C.
121
Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
12
Japanese engineers were asked to redesign the front end of the Bullet Train because it carried enough speed to create a sonic boom whenever it exited a tunnel. Residents could feel the blast from miles away.
11
When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
On average, 100 people choke to death on ballpoint pens every year.
72
The average cough comes out of your mouth at 60 miles per hour.
126
Mushrooms are more closely related to humans than they are to plants.
47
A fire in Australia has been burning for more than 5,000 years!
91