Cows can sleep standing up, but they can only dream lying down.
745
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
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
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
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
The largest breed of rabbit is the Flemish Giant.
65
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94