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TIL citizens in Estonia are given an ID card that includes a public/private key pair allowing users to cryptographically sign digital documents.

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DQnkg Today I Learned that even though chilies and peppers aren't related, chilies are often called "chili peppers" because of an historical error caused by Christopher Columbus mistakenly linking the "spiciness" and "heat" of native Latin American chilies to Indian pepper.
WMNB TIL that in 1972, a serbian flight attendant fell from 33000ft (10000m) after the plane she was flying in was torn apart by an explosive device. She survived the fall without permanent injuries.
KOK9J TIL about The tragedy of the commons- an economic problem in which every individual has an incentive to consume a resource at the expense of every other individual with no way to exclude anyone from consuming resulting in overconsumption and ultimately depletion of the resource.
rLDe TIL the book ‘Walden’ by Henry David Thoreau is often seen as a 'bible’ for self-sufficiency enthusiasts. However, while many picture Thoreau as a hermit in the woods, his cabin on the lake was about a mile from town, where he would often go to visit his mother, who did his laundry for him.
KOpBG TIL that 18th century France developed a visual telegraph system. Using a series of towers topped with adjustable beams that would display a message and instructions on the next tower to relay it to, messages could be sent across the country in a mere matter of hours, long before electricity.