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
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 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
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Only about 2% of the world population has green eyes.
36