Human hair and fingernails continue to grow after death.
7
The average person's skin weighs twice as much as their brain.
131
The human brain is more active during sleep than during the day.
28
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307