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TIL what PDA or Pathological Demand Avoidance is. Pathological demand avoidance (PDA) is a proposed disorder and sub-type of autism spectrum disorder,[1] defined by characteristics such as a greater refusal to follow the requests of others.

Read more autism.org.uk

via reddit.com

9w65p TIL that when the Arctic ground squirrel hibernates it's body temperature can reach -2.9 degrees. It can prevent it's blood from freezing by cleansing it's body of ice nucleators which enable the development of ice crystals. This is being studied to help preserve human organs for transplant.
QJapM TIL that Robert Downey Jr considered retiring as Iron Man in 2013 after receiving an on-set injury, believing that he was too old to continue playing the role of Tony Stark.
x8YB TIL that besides déjà vu, there is also jamais vu (a familiar situation that is not recognized), presque vu (the feeling of being on the verge of an epiphany), and déjà entendu (feeling certain you’ve already heard something).
AND9g TIL that the act of vomiting involves a complex series of chain-link reactions by your body that connect to a "vomit center" in the brain. The lower digestive system in cases of perceived poisoning shuts down and causes the stomach to convulse in order to bring everything back up the way it came in.
NX5XJ TIL that in 2021 The Republic of Turkey officially changed it's spelling to Türkiye