Cows can sleep standing up, but they can only dream lying down.
745
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Only about 2% of the world population has green eyes.
36