The adult human brain weighs about 3 pounds (1,300-1,400 g).
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One out of 20 people have an extra rib.
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On average, there's 100 billion neurons in the human brain.
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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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In one day, adult lungs move about 10,000 litres of air.
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The human brain has the capacity to store everything that you experience.
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Fingernails grow fastest on the hand you favor.
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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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