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TIL resident killer whales in the eastern North Pacific form matrilineal social groups, consisting of the eldest female, her children, and the descendants of her daughters. Closely related matrilines with similar dialects form aggregations called pods, which in turn form clans and communities.

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0dMxA TIL about Garderobe, Toilets in a Medieval Castle that were usually built into the walls, like a simple hole discharging to the outside into a cesspit (akin to a pit latrine) or the castle moat (like a fish pond toilet). It was believed that ammonia would protect visitors' coats and cloaks from moth
5YVpr TIL that Jon Lovitz blames Andy Dick for contributing to the death of Phil Hartman by giving Hartman’s sober wife coke causing her to relapse and have a mental breakdown
1ag7d TIL only one person in recorded history has been struck by a meteorite.
yVdJV TIL that Icelanders gather every fall to save baby puffins (pufflings) that have gotten lost and they do it by throwing them off a cliff.
N7rle TIL Apollo 10 was under-fueled on purpose, just in case Stafford and Cernan got any cowboy ideas on trying to land on the moon. Nelson said that NASA was concerned they would attempt an unplanned landing, writing they said "Don't give those guys an opportunity to land, 'cause they might!"