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TIL that in the geologic record, a thin layer of sediment separates the Mesozoic Era (the age of the dinosaurs) from the Cenozoic (the current era). This sediment is unusually high in Iridium, an element much more common in asteroids than on earth.

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VMQNB TIL that a person with a one-hour commute has to earn 40 per cent more money to be as satisfied with life as someone who walks to the office.
QXja TIL two Christian monks smuggled silkworms out of China in bamboo canes. Those silkworms were used to give the Byzantine Empire a trade monopoly in Europe, which became the foundation of their economy for the next 650 years.
woVM8 TIL Most of the iodine in dairy comes from iodine-based sanitizers used to clean the cow teats between milking. This residual iodine then seeps into the milk.
R7jgw TIL the general consensus among theologians is that the birth date of Jesus Christ is between 6 and 4 Before Christ
oRJ68 TIL that Ben & Jerry's had to apologise after inadvertently naming an ice cream flavour after a brutal paramilitary group.