Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human sigh acts as a physiological reset button.
23
Your heart will pump about 212 million liters in its lifetime.
26
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
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
The average sperm cell swims at 8 inches per hour.
76