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TIL Tears contain a natural painkiller leucine-enkephalin which reduces pain and improves mood

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kJ8R7 TIL the East Palestine crash isn't the first time Norfolk Southern has had a major hazmat train derailment. In 2005, a Norfolk Southern train crashed into a textile mill, releasing 60 tons of chlorine gas, putting 4,000 people out of work, and costing $215 million to settle.
9Y0pm TIL Pacific sardines decreased by 95% between 2006-2017, believed to be caused by overfishing
R0jl TIL of Rick Rescorla, Morgan Stanley’s head of security at the World Trade Center, who predicted the 1993 bombings and the 2001 attack. He ignored the Port Authority’s instructions to not evacuate, and saved all but seven of his 2,687 employees. He died in the towers.
pYrx8 TIL humans can learn to observe their surroundings with echolocation. By snapping or clicking the tongue, humans can bounce sound waves off of nearby objects. The resulting echo reveals the approximate size and distance of the obstacle. Anyone with normal hearing can learn this skill.
VD8D TIL if the federal government replaced the $1 bill with the $1 coin (and the US population accept the non paper currency), it would save the government approximately $184 million a year, or $5.5 billion over 30 years