Cows can sleep standing up, but they can only dream lying down.
745
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118
Your body is creating and killing about 2.4 million red blood cells per second.
17
No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
154
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