In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
You forget 90% of your dreams.
256
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Cows can sleep standing up, but they can only dream lying down.
745
Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
4
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