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TIL An average tree is made up of 99% dead cells, only around 1% is alive at any time, consisting of the leaves, root tips, and phloem a thin layer of under bark that acts as a food delivery system.

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KPbw TIL the “Made in [Country]” mark was first established by the UK in 1887 in order to denounce foreign goods (mostly made in Germany) and encourage consumption of domestic goods. The plan backfired and consumers specifically bought products made in Germany as they were seen as reliable and cheap.
Y7VyA TIL Grand Theft Auto was influenced by Pac-man
QJnM9 TIL that in several experiments giving mirrors to rhesus monkeys, they looked into the mirrors and groomed themselves, as well as flexed various muscle groups. This behaviour indicates that they recognised and were aware of themselves.
M7xmK TIL about Tommy Manville, the heir to the Johns-Manville fortune. The terms of his family trust granted him $250,000 "when he married." As a result he got married 13 times, giving the women a cut of the proceeds before quickly divorcing them.
DQoYV TIL about the ancient Mesopotamian practice of using a substitute king to protect the real king from evil omens. The real king would go into hiding, and rites were performed to transfer the danger onto the substitute. At the end of the ritual, the substitute is put to death.