You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
The average person's skin weighs twice as much as their brain.
131
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
Your body is creating and killing about 2.4 million red blood cells per second.
17
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16