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TIL Shoveling snow is a known trigger for heart attacks. Some hospitals even prepare for more cardiac related visits after a large snowfall.

Read more health.harvard.edu

via reddit.com

VBQam TIL in 1985, Japan Airlines flight 123 crashed and over 500 people were killed. The plane's aft pressure bulkhead was damaged seven years prior, but was not repaired correctly. When it failed, the crew lost all control of the plane. Only four people survived.
nWek7 TIL palimpsest are texts which have been scrapped to be reused. In the Middle Age, due to the scarcity of parchment (made from animal skins), older manuscripts were reused this way
PYbAE TIL that an Ikea in the Netherlands had to cancel their 1 euro breakfast special because it attracted too many customers and caused traffic jams on the highway.
4DLo TIL that all navel oranges are united clones from a solitary tree change that happened very nearly 200 years back in Brazil. All things considered, they might all be considered product of that unique tree, and are all hereditarily indistinguishable.
XEYX6 TIL the Civil War started in Wilmer McLean's backyard and ended at his kitchen table.