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TIL spiders can produce “milk” for their offspring

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a8vWL TIL: Your Backyard Birds are Living Dinosaurs! Despite their small size and fluffy feathers, birds are the last surviving group of dinosaurs, stemming from the theropod dinosaur lineage.
4X8AJ TIL that ancient Greeks used to go to the gym naked and they competed nude to encourage aesthetic appreciation of the male body, and to be a tribute to the gods.
R5M44 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
v1MkB TIL football, baseball, basketball and hockey were all invented by Canadians.
wor6M TIL that penguins can drink saltwater thanks to a special gland near their eyes that filters out the salt. This allows them to survive in ocean environments without access to fresh water.