Only about 2% of the world population has green eyes.
36
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
34
Cows can sleep standing up, but they can only dream lying down.
745
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14