Cows can sleep standing up, but they can only dream lying down.
745
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
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
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
A cow produces around 200,000 glasses of milk in her lifetime.
373
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13