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36

TIL Los Angeles has a metro system

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698Yl TIL a young woman's head swelled from her usual measurement of 22 inches to 24.8 inches (and the shape of her face changed) after she used hair dye. This was because the hair dye had a chemical in it called PPD (paraphenylenediamine), which can cause serious allergic reactions in certain people.
7pOX TIL that people are ticklish where we are must vulnerable to attack (behind the knees, armpits, etc.) Our response to being tickled trains us to quickly block those locations as if in a defensive fight.
QNeAe TIL: Scar turns into angry Pooh at the end of “Be Prepared” - Jim Cummings takes over the vocals from Jeremy Irons near the end (~2:37 in this video) and all I hear now is evil Pooh
KYZ8Q TIL that Sirius B, the smaller star of the Sirius binary system, has a little more mass than the Sun while being slightly smaller than the Earth.
eGoL TIL of “Shifting Baseline Syndrome”, where each generation uses previous reference points as baselines despite those points representing significant changes from even earlier states. Each generation defines the “natural” state differently, and large changes over time often go unnoticed.