A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Only about 2% of the world population has green eyes.
36
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Your body is creating and killing about 2.4 million red blood cells per second.
17
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The strangers in your dreams are actually people that you've seen in real life.
50