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TIL Finland's territory is expanding by 7 km^2 every year even without war. This is due to the effect of 'post-glacial rebound'.

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ZpXEv TIL About 3800 Years Ago a Babylonian Student Sent a Letter to His Mom to Complain About His Clothes
M7gYa TIL that jazz musicians shut off their dorsolateral prefrontal cortex, responsible for self-monitoring performance, and activate their medial prefrontal cortex, which helps with storytelling. This resembles our brain patterns while dreaming.
n6Mb TIL Groups of Hermit Crabs will sometimes form “Vacancy Chains” around empty large shells that they themselves are too small to fit into. Once a large enough crab comes to occupy the big shell it initiates a mass swap of shells so that all crabs in the chain can get an upgrade.
8e7E8 TIL Ted Kaczynski carried on working on pure mathematics from his cabin in Montana and he even submitted a type-written paper to a math journal in 1976 which he claimed proved an earlier posited solution
Y7aKG TIL that some mattresses contain inhalable fiberglass fragments which can have adverse health impacts such as lung irritation and damage.