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TIL - Ants sometimes lay a trail of pheromones that circles back onto itself, trapping all the other ants in a death spiral where the entire colony runs to death.

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JWOl TIL that a WWI submarine U-28 sunk after it was struck by an automobile which flew off a cargo ship it had just torpedoed
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oRrpL TIL that Wasabi is one of the most medicinally active plants on Earth and one of the 7 main culinary ingredients in Japan
jN77N TIL about Harris Wofford, a former United States senator who, in his youth, founded a student movement for the creation of a world government. It had grown so large by the time he was 18 that Newsweek predicted he would become President one day.
Z84go TIL that the Inca Road system was at least 40,000 kilometres (25,000 mi) long. The roads were carefully planned and maintained. They were paved where necessary, had stairways, bridges and constructions such as retaining walls and a drainage system. Only 25% of the system remains visible today.