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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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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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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
![Jens Roland and colleagues marked (notice the QME on the wing) and recaptured many Rocky Mountain Pa](https://biology-forums.com/gallery/47/medium_33_22_09_11_9_35_55_17971444.jpeg)
![A view of a typical filler tube with the fuel tank removed. Notice the ground strap used to help ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_11_10_53_29967952.png)