Cows can sleep standing up, but they can only dream lying down.
745
Only about 2% of the world population has green eyes.
36
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
Your body is creating and killing about 2.4 million red blood cells per second.
17