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TIL that bad breath wasn’t considered a real problem until Listerine, who said their mouthwash cured “Halitosis” — a non-medical term.

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yV0Qv TIL Male llamas and alpacas have what are called "fighting teeth", that they use to fight over mates
DVNJ TIL A man who wanted to create a whites-only town in North Dakota was found to be of African descent
QYQX TIL: A woman with Type 1 diabetes underwent an islet cell transplant. Since the transplant, her glucose levels have remained at a healthy level, and she was taken off insulin and has no dietary restrictions. “She is like a nondiabetic person but requires antirejection drugs,”
5V6br TIL that ordinary matter makes up only about 5% of the universe, dark matter makes up about 27%, while the rest is thought to be dark energy. It's thought that dark matter shapes the cosmos, organizing galaxies and cosmic objects on a large scale.
QNG96 TIL that Rainbows are affected by polarization.