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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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On average, the stomach produces 2 L of hydrochloric acid per day.
![Jaundice. Photograph of an individual with liver disease, evidenced by the yellowing of the sclera o](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_22_58_96781691.jpeg)
![Although average brain size increases gradually though time in H. erectus, individuals with small br](https://biology-forums.com/gallery/47/medium_275510_22_02_15_5_56_53_207641723.jpeg)