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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are approximately 3 million unintended pregnancies in the United States each year.