Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Your thumb is about the same size as your nose.
124
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
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
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82