The average person's skin weighs twice as much as their brain.
131
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
On average, there's 100 billion neurons in the human brain.
83
A person can live without food for about a month, but only about a week without water.
156
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Enamel is hardest substance in the human body.
61
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23