The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
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