The adult human brain weighs about 3 pounds (1,300-1,400 g).
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If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
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After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
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The human brain uses approximately as much energy as a 10 watt light bulb.
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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There are about 1,400 different species of bacteria in your belly button.
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If you are cold you are more likely to be hungry because you use energy to keep warm.
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The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
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