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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.