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TIL that despite the popular belief that SOS stands for "Save Our Ship" or "Save Our Souls", it actually doesn't stand for anything. SOS was developed because it was an easy sequence of letters to remember in Morse Code (three dots, three dashes, three dots).

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KOVgB TIL In Thai, the number 5 is pronounced "ha", so instead of typing "hahahahaha," Thai speakers will sometimes write "55555."
e0vGg TIL that helium isn’t the only gas capable of changing the sound of your voice. Sulfur hexaflouride makes your voice deeper!
GAWbG TIL there is a genetic disorder many people have with something called Lipoprotein (a), and it puts people at high risk of heart disease, heart attack, stroke, and aortic stenosis. It’s 100% genetic, can’t be corrected, and can only be treated with aggressive cholesterol control.
gDLb TIL Sean Connery was offered the role of Gandalf in the Lord of The Rings trilogy. He was offered 15% of worldwide box-office receipts, totaling close to $400 million. He turned it down due to “not understanding the script”.
nkYP TIL “The needs of the many outweighs the needs of the few” has no classical history. It was first spoken by Spock in Star Trek II: The Wrath of Khan.