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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
There are 60,000 miles of blood vessels in every adult human.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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