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TIL of the bristlecone pine forests in California whose trees are the oldest living organisms on the planet. At 4800 years old, some of the pines growing there today began growing before the pyramids were built.

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via reddit.com

Ae6B TIL of Dunbar’s number, a theory that suggests there is a cognitive limit to how many people one person can maintain a meaningful relationship with. The number he suggests, 150. There are 4 layers to this; your 5 closest friends, 10 “best” friends, 35 “close friends”, and 100 not so close friends.
npwo TIL that the lightsaber Samuel L Jackson used in the Star Wars movies had the words “bad motherfucker” engraved into it.
4A4a TIL a Canadian man was told by a Superior Court to continue paying child support for twins despite a DNA test proving they weren’t his.
VMARG TIL about Sam Berns, a teenager who died of a rare disease called progeria that makes children age extremely quickly. He was actually a motivational speaker who gave a Ted Talk called "My philosophy for a happy life"
neZKP TIL of the "first night effect". During the first night in unfamiliar surroundings the left side of the brain stays awake and the right ear, which is connected to the left side of the brain, remains more alert to unusual sounds.