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Biology Facts

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If a person's DNA was stretched into a string, it would stretch from the sun to Pluto and back—17 times.

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The heaviest human brain on record weighed just over 5 pounds––the weight of your typical bag of flour from the grocery store.

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Children have 300 bones––adults, only 206.

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During your lifetime, you will produce enough saliva to fill approximately two swimming pools.

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Your nose can remember and recognize about fifty thousand different scents.

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The average human body carries nearly ten times as many bacterial cells as human cells.

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Been thinking a lot today? Believe it or not, the human brain is actually much more active at night than during the day.

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A human blood cell can circulate through the entire body in about one minute.

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The human body contains enough carbon to fill about 9,000 pencils.

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There are nearly 74 km worth of nerves in the average human body.

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Your brain has approximately 100 billion nerve cells, or neurons.

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Microbiologists have estimated that a random handful of dirt can contain anywhere from 3 million to 50 billion microscopic organisms.

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The smallest bone in the human body is located deep inside the ear. Known as the stirrup, it measures about the size of a grain of rice.

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It would take about 650 AA batteries to power a human being for a single day.

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