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TIL seahorse couples greet each other every morning with a dance, which sometimes involves changing colour. It is a way of reinforcing their bond and synchronising their reproductive cycles.

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699P7 TIL about the battle of talas. A battle where the forces of the Abbasid caliphate and the allied Tibetian empire fought against the Tang Dynasty of China for control of sry darya region of Central Asia. The battle ended with a Abbasid victory that marked the end of the Tang westward expansion.
L7yQ TIL Zappos CEO Tony Hsieh, after a late night of drinking, made a bet that if he called the Zappos hotline, the employee would be able to locate the nearest late-night pizza delivery. He did this to show how good his company’s customer service was, and he was right.
4kpmN TIL of the Bolvano Train Disaster which claimed the lives of more than 500 people in 1944. After the train became stalled in a tunnel, the passengers and crew succumbed to carbon monoxide poisoning when the locomotives attempted to continue and filled the tunnel with smoke.
8ayma TIL: humans have developed injections containing nanoparticles which when administered into the eye convert infrared into visible light giving night vision for up to 10 weeks
pYOL8 TIL Roman Emperor Augustus Banished his Own Grandson for Reasons Unknown