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    "segs": [ {
      "utf8": "When you think of natural history museums,"
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    "segs": [ {
      "utf8": "you probably picture exhibits \nfilled with ancient lifeless things,"
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    "segs": [ {
      "utf8": "like dinosaurs"
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    "segs": [ {
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  }, {
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    "segs": [ {
      "utf8": "and gemstones."
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  }, {
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    "segs": [ {
      "utf8": "But behind that educational exterior,"
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    "segs": [ {
      "utf8": "which only includes \nabout 1% of a museum's collection,"
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  }, {
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    "segs": [ {
      "utf8": "there are hidden laboratories \nwhere scientific breakthroughs are made."
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  }, {
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    "segs": [ {
      "utf8": "Beyond the unmarked doors,"
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  }, {
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    "segs": [ {
      "utf8": "and on the floors \nthe elevators won't take you to,"
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  }, {
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      "utf8": "This maze of halls and laboratories \nis a scientific sanctuary"
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    "segs": [ {
      "utf8": "that houses a seemingly \nendless variety of specimens."
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  }, {
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    "segs": [ {
      "utf8": "Here, researchers work to unravel \nmysteries of evolution,"
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    "segs": [ {
      "utf8": "cosmic origins,"
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    "segs": [ {
      "utf8": "One museum alone \nmay have millions of specimens."
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    "segs": [ {
      "utf8": "The American Museum of Natural History\nin New York City"
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  }, {
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    "segs": [ {
      "utf8": "has over 32,000,000 in its collection."
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  }, {
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    "segs": [ {
      "utf8": "Let's take a look at just one of them."
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    "segs": [ {
      "utf8": "Scientists have logged exactly\nwhere and when it was found"
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    "segs": [ {
      "utf8": "and used various dating techniques \nto pinpoint when it originated."
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    "segs": [ {
      "utf8": "Repeat that a million times over,\nand these plants,"
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  }, {
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  }, {
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    "segs": [ {
      "utf8": "and artifacts present windows \ninto times and places around the world"
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  }, {
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    "segs": [ {
      "utf8": "and across billions of years of history."
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      "utf8": "When a research problem emerges,"
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    "segs": [ {
      "utf8": "scientists peer through these windows\nand test hypotheses about the past."
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    "segs": [ {
      "utf8": "For example, in the 1950s, \npopulations of predatory birds,"
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    "segs": [ {
      "utf8": "and eagles started to mysteriously crash,"
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    "segs": [ {
      "utf8": "to the point where a number of species,\nincluding the bald eagle,"
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    "segs": [ {
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    "segs": [ {
      "utf8": "Fortunately, scientists in \nThe Field Museum in Chicago"
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    "segs": [ {
      "utf8": "had been collecting the eggs \nof these predatory birds for decades."
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  }, {
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    "segs": [ {
      "utf8": "They discovered that the egg shells \nused to be thicker"
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      "utf8": "and had started to thin around the time"
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    "segs": [ {
      "utf8": "when an insecticide called DDT \nstarted being sprayed on crops."
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    "segs": [ {
      "utf8": "but when birds came and ate\nthose heaps of dead bugs,"
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    "segs": [ {
      "utf8": "America thanks you, Field Museum."
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      "utf8": "Natural history museums \nwindows into the past"
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      "utf8": "Museum scientists have used \ntheir collections"
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    "segs": [ {
      "utf8": "and even pinpoint where \nancient giant sharks gave birth."
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      "utf8": "There are about 900 \nnatural history museums in the world,"
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      "utf8": "and every year they make \nnew discoveries and insights"
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      "utf8": "For instance, \nnaturalists have been collecting samples"
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    "segs": [ {
      "utf8": "for over 100 years from Walden Pond,"
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    "segs": [ {
      "utf8": "famously immortalized \nby Henry David Thoreau."
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    "segs": [ {
      "utf8": "are blooming over three weeks earlier \nthan they did 150 years ago."
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      "utf8": "Because these changes \nhave taken place gradually,"
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    "segs": [ {
      "utf8": "one person may not have noticed them\nover the span of a few decades,"
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      "utf8": "So the next time you're exploring \na natural history museum,"
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    "segs": [ {
      "utf8": "remember that what you're seeing \nis just one gem"
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      "utf8": "of a colossal scientific treasure trove."
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      "utf8": "And who knows?"
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