In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
Examples of animals with external gills.
Fish
angler fish 3
Reptiles (lizards, snakes, and turtles) often carry Salmonella