Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human brain doesn't stop developing until about 25 years old.
102
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
There are about 1,400 different species of bacteria in your belly button.
10
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
A human being loses an average of 40 to 100 strands of hair a day.
133
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127