You forget 90% of your dreams.
256
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Only about 2% of the world population has green eyes.
36
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Cows can sleep standing up, but they can only dream lying down.
745