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
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Your thumb is about the same size as your nose.
124