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TIL Nearly every time Paul Rudd has gone on Conan to promote a movie or show he plays a clip from "Mac and Me".

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drgE TIL dental cavities are a transmissible disease. They are caused primarily by one pathogen, Streptococcus mutans.
69Pmm TIL about turkey tails and their connection to obesity in the Pacific Islands.
Lk0g9 TIL that archeologists have found several iron tools, weapons and cultural objects dating thousands of years before the advent of the Iron age. These objects were held in high regard for their qualities and were made by cold forging iron obtained by fallen meteors.
rNmgW TIL a population bottleneck occurred in human evolution about 70,000 years ago, and one theory for why this occurred is a supervolcano eruption in Indonesia. It caused a volcanic winter, which resulted in a drop of the global mean surface temperature by 3–5 °C.
ADAk7 TIL The ancient Romans in Pompeii had "nearly perfect teeth" because of the lack of refined sugar in their Mediterranean diets.