Here is some stuff for a variety of levels + some useless facts
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10) Sleep literally cleans your brain. During slumber, more cerebrospinal fluid flushes through the brain to wash away harmful proteins and toxins that build up during the day.
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11) The manchineel tree is nicknamed the "Tree of Death" for good reason: Touching it can leave chemical burns on your skin, its fruit is toxic, and its bark—when burned—can cause blindness.
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12) Space has a distinct smell: a bouquet of diesel fumes, gunpowder, and barbecue. The aroma is mostly produced by dying stars.
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13) The annual number of worldwide shark bites is 10 times less than the number of people bitten by other people in New York.
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14) When Canada's Northwest Territories considered renaming itself in the 1990s, one name that gained support was "Bob."
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15) Both John Adams and Thomas Jefferson died on July 4, 1826—exactly 50 years after the adoption of the Declaration of Independence.
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16) Bubbles keep your bath water warmer longer.
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17) Fried chicken was brought to America by Scottish immigrants
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18) There are 71 streets in Atlanta with "Peachtree" in their name.
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19) One of the world's largest stockpiles of nuclear weapons—a U.S. Navy base near Seattle—is partially defended by trained dolphins.
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