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 idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Your thumb is about the same size as your nose.
124
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102