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6

TIL that bombardier beetles defend themselves by creating a chemical reaction inside their bodies that heats a spray to near boiling and explosively shoots it at predators.

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d8EkB TIL about the Kowloon Walled City, a completely ungoverned settlement in the middle of Hong Kong. It was the most dense settlement in history, and was built entirely by hand.
BgYOr TIL that the Medjool date palm (today the most common date cultivar) almost went extinct from disease in the 1920s but was saved when an American botanist acquired eleven shoots to take to the U.S. from Morocco. Nine survived, from which all modern Medjool offshoots originate.
QNkQk TIL: The famous piano coda on Layla by Derek & The Dominos was plagiarized
P1j7V TIL, in 2015, a USAF AC-130 Destroyed A Médecins Sans Frontières Hospital Killing over 40 People But No Independent Investigation Was Carried Out For The Warcrime
ERmo TIL a massive international airport was built in Spain at a cost of €1.1 billion. It attracted very little airline traffic, being 200 km from the nearest city, and closed four years after it opened.