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418

TIL - that Bluey is a girl

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W79mX TIL that some employers use military-grade surveillance tools originally developed for the Pentagon and the CIA to track staff behavior, emotions, fatigue, work intensity, and productivity.
pejN TIL that S.E. Hinton wrote The Outsiders when she was only 15 years old and it has sold 500k copies a year since 1967.
VB0b8 TIL the history of popcorn. It's 6700 years old.
5Vn7r TIL that bottlenose dolphins (Tursiops truncatus) each have their own distinctive whistle sounds they use to identify each other. When they hear their unique sound called out, they answer back, using their personal theme song as a way to call each other by name.
M7LBm TIL while laying underwater cable in the Chicago river a diver discovered a 40ft submarine. Inside he found the remains of a human and a dog. Their identity is still a mystery more than a century later.