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
You forget 90% of your dreams.
256
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Your body is creating and killing about 2.4 million red blood cells per second.
17
The strangers in your dreams are actually people that you've seen in real life.
50
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14