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The horizontal fraction bar was introduced by the Arabs.
Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
The familiar sounds of your heart are made by the heart's valves as they open and close.