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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
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
Only about 2% of the world population has green eyes.
36