The strangers in your dreams are actually people that you've seen in real life.
50
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
A cow produces around 200,000 glasses of milk in her lifetime.
373
Only about 2% of the world population has green eyes.
36
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