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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Your body is creating and killing about 2.4 million red blood cells per second.
17
Cows can sleep standing up, but they can only dream lying down.
745