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        "origin": "Egypt",
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      "mu0",
      "G",
      "alpha",
      "c_light",
      "c_light_2"
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    "thermo": [
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      "avogadro",
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      "joule",
      "planck_h"
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    "molecules": [
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    "life": [
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      "lemur",
      "human",
      "tardigrade",
      "elephant",
      "hummingbird"
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      "avogadro_old",
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      "hubble",
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