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TIL lead is used as a coolant in nuclear reactors

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xY7b TIL Cats in America have contributed to the extinction of 33 bird species.
9YnwB TIL "Inuit" is plural, "Inuuk" is dual, "Inuk" is singular.
YQpW TIL US taxpayers fund the overwhelming majority of addiction research in the world.
v10yD TIL there is a secret entrance to the White House through an alley on H Street
MAea TIL that Sinclair Lewis wrote a satirical novel entitled ‘Main Street’ which criticized the close mindedness of a fictional small town in Minnesota. It was banned by the town of Alexandria (a small town in Minnesota), because they disagreed with it.