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TIL that killer whales, or orca whales have a highly developed ‘limbic system’, which suggests that they feel a stronger level of empathy and social cohesion towards their peers than any other mammal, including human beings and other cetaceans.

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VlZG TIL Japanese knotweed is listed by the World Conservation Union as one of the world’s worst invasive species. It damages concrete foundations, buildings, flood defences, roads and architectural sites. In 2010, the UK released into the wild a Japanese insect that feeds on Japanese knotweed.
rRnX0 TIL saying “ahoy-hoy” was at one time the preferred way to answer the phone.
9YnNB TIL the 'Kerala School' identified the 'infinite series'- one of the basic components of calculus - in about 1350. The discovery is currently - and wrongly - attributed in books to Sir Isaac Newton and Gottfried Leibnitz at the end of the seventeenth centuries.
8ek7a TIL the Wright brothers' father only flew once when he was already 82 years old. The aircraft rose to about 350 feet with the old man encouraging his son "Higher, Orville, higher!"
p7gO TIL that, as of June 1 2012, The List of Advanced Dungeons and Dragons 2nd edition Monsters is the longest Wikipedia article ever.