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TIL that baleen whales evolved to use bone conduction as their primary hearing mechanism.

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6WBJ TIL that the age of consent in Japan is only 13 years old.
KOj7w TIL Voltaire's joke that the Holy Roman Empire (HRE) was "neither holy, nor Roman, nor an empire" was mostly true. The center of the Church at the time was actually the Vatican, the HRE's people were mostly Germanic and not Roman, and the nation was never truly unified at any point in its history.
XEvOr TIL that using mouth wash can damage the microbiome to the point that it can have a slight but noticeable negative impact on your blood pressure when eating foods containing nitrates and nitrites.
wLbaM TiL One of the few (and perhaps the only) citizen-led protest against Kristallnacht in 1938 was organised by an Indigenous Australian named William Cooper. Almost 30 years before Indigenous Australians were allowed to be citizens of Australia.
wkwP TIL in 1924, children playing on the banks of a river in Germany discovered a human skull. More bones were discovered, eventually leading to the arrest of Fritz Haarman, who was butchering humans and selling their flesh as pork.