On average, there's 100 billion neurons in the human brain.
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A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
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Wearing headphones for an hour increases the bacteria in your ear 700 times.
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Fingernails grow fastest on the hand you favor.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Your heart pumps about 2,000 gallons of blood each day!
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