There are about 1,400 different species of bacteria in your belly button.
10
A human being loses an average of 40 to 100 strands of hair a day.
133
Your heart will pump about 212 million liters in its lifetime.
26
In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
22
The human brain doesn't stop developing until about 25 years old.
102
The average sperm cell swims at 8 inches per hour.
76
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17