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TIL most mammals live for the same number of heartbeats before dying, from elephants to shrews.

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W7gnL TIL that schizophrenic hallucinations vary across culture, western illusions usually being more violent and harmful
Br7Ex TIL In 1904, tea bags were invented accidentally. The inventor, Thomas Sullivan, decided that it was cheaper to send small samples to potential customers in silk bags instead of boxes. The recipients believed they were meant to be dunked and soon Sullivan was flooded with orders for his “tea bags.”
7rLgx TIL there are ten different indigenous languages still spoken today in the British Isles; English, Scots, Welsh, Gaelic, Irish, Cornish, Manx, Angloromani, Shelta and British Sign Language
epyv4 TIL Dealey Plaza in Dallas remains virtually unchanged since 1963. There is a proposal to make Elm Street into a pedestrian promenade since tourists often wander onto the painted X where Kennedy was shot as well as an amphitheater for visitors to contemplate the assassination site
ADnwB TIL that macaroni and cheese originated in the 14th Century. A Middle English recipe describes it as "Take and make a thynne foyle of dowh. and kerve it on pieces, and cast hem on boiling water & seeþ it well. take cheese and grate it and butter cast bynethen and above as losyns. and serue forth."