If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Your thumb is about the same size as your nose.
124
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The strangers in your dreams are actually people that you've seen in real life.
50
Only about 2% of the world population has green eyes.
36