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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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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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Illicit drug use costs the United States approximately $181 billion every year.
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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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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
![The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_42_25_8233102.jpeg)
![Peptic ulcer. A peptic ulcer may occur in the stomach (gastric ulcer), as shown here, or in the duod](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_53_96882468.jpeg)