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TIL there can be a >135f differential between the Antarctic air temperature and the incubation temperature of emperor penguin eggs. Male emperor penguins incubate the eggs over the winter, fasting for 4 months, holding them between their feet and a super insulated down pouch until they hatch.

Read more antarctica.gov.au

via reddit.com

OorKg TIL that as Drone Bees mate with Queen Bees mid-flight, all blood in the Drone's body rushes to his endophallus causing him to lose control of his body. After inseminating the queen, his body falls to the ground leaving part of his endophallus in the queen.
e08bb TIL: Babies’ cuteness is key to their survival. Cute babies are just extremely hard to ignore, and this is likely hardwired into human brains. Less cute children are treated differently.
QJ1mp TIL that cats wiggle their bums when they prepare to pounce in order to check their balance. It helps determine if they have solid ground under their hind legs and if they will make the jump distance safely.
W7Eo9 TIL that a Photographer was rewarded 1.2 Million USD because a Bird Control Company used his Picture of a Dove without Permission although the Company had hired him for the Picture in the first place. They had continued to use it anyway outside the original contractual Purpose.
R7eY8 TIL the term “the big apple” originally referred to horse racing. The city got its most famous nickname from a local newspaper’s horse racing column in the 1920s. Prior to the city’s adoption of the nickname, the phrase “Big Apple” was used to describe a big money prize at important horse races.