A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
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
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Cows can sleep standing up, but they can only dream lying down.
745