2. The human brain contains between 80 and 100 billion neurons.
3. More than 100,000 chemical reactions occur in the brain every second.
4. The human brain is the only object of any kind that can contemplate itself.
5. The human brain weighs about 1.4 kg (3 pounds).
6. The human brain can generate about 23 watts of power (enough to power a light bulb).
7. Sixty percent of the human brain is composed of fat. This makes it the fattiest organ in the human body.
8. The brain uses 20% of the body's total oxygen and energy.
9. The brain does not have pain receptors, therefore it cannot feel external pain.
10. The average brain generates up to 50,000 thoughts per day.
11. Your brain has an autopilot setting that allows us to perform common tasks, such as driving, without actively thinking about them.
12. Your brain never sleeps while you sleep; it's busy performing maintenance.
13. When a person dies, they have 7 minutes of brain activity.