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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The horizontal fraction bar was introduced by the Arabs.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
![Sexual swellings are one way for females to advertise their mating availability, thereby inducing ma](https://biology-forums.com/gallery/47/medium_269691_26_01_15_5_55_23_204361867.jpeg)
![(a) Male competition can be fierce. (b) This male baboon has bite wounds suffered in competition wit](https://biology-forums.com/gallery/47/medium_269691_26_01_15_5_55_25_204431297.jpeg)