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TIL when Vietnam invaded Cambodia, the Cambodian king sent a beautiful woman who convinced the Vietnamese commander to withdraw. The Vietnamese then sent a famous general, who also withdrew after meeting the same woman.

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rNyWy TIL that fish are not silent underwater. They actually make a large variety of sounds, from clicking to squeals, with some even chirping like birds. These noises are used to communicate many different things, like warning off other fish or announcing the presence of a predator.
8aoeV TIL of xenobots; Synthetic lifeforms designed by AI which are part robot, part organism, the size of a grain of sand and capable of performing tasks such as pushing payloads, cleaning debris, working together in swarms and even reproduce new xenobots
1L44 TIL The penalty for killing an elephant in Sri Lanka is death
LQyov TIL LabCorp owns a fleet of planes and has the call sign SKYLAB
0dEX5 TIL that at room temperature, air molecules vibrate at roughly 1,100 mph (~500m/s) — about 50% faster than the speed of sound.