Mars had an oxygen-rich atmosphere around 4 billion years ago
13
You forget 90% of your dreams.
256
Only about 2% of the world population has green eyes.
36
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Cows can sleep standing up, but they can only dream lying down.
745
A cow produces around 200,000 glasses of milk in her lifetime.
373