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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Thyroid conditions may make getting pregnant impossible.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Cyanide works by making the human body unable to use oxygen.
Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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