Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Only about 2% of the world population has green eyes.
36
Cows can sleep standing up, but they can only dream lying down.
745
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118