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
Cows can sleep standing up, but they can only dream lying down.
745
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
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
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82