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TIL: Underwater bomb detectors can be used to track whale populations and in 2022 scientists used bomb detectors to uncover a new population of pygmy blue whales in the Indian Ocean

Read more newsroom.unsw.edu.au

via reddit.com

M775K TIL about the Qianli chuan ('thousand league boat'), a human powered paddle wheel boat invented in the late 5th century AD during the Southern Qi Dynasty. The boats were able to cruise hundreds of kilometers per day with by humans peddling them. They were used as war ships and tug boats.
reDM TIL Death Note was banned in China in 2005. Students had been making Death Notes, writing the names of acquaintances, enemies, and teachers in the books.
yB0V TIL in 2001 a teenager in Sweden was arrested for suspicion of treason after throwing a strawberry tart at the King
rRlPy TIL about Veronica Seider, a German woman born with superhuman eyesight who is capable of identifying people a mile (1.6 kms) away.
5VrGr TIL Whale songs can be used to map out the ocean floor