› added 2 years ago

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TIL sine and cosine waves are actually a spiral in 3D. The 2D version is just a side view of the spiral.

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mxpYR TIL the German submarine U-530 surrendered to the Argentine Navy on 10 July 1945 at Mar del Plata, an Argentine reporter claimed that he had seen a police report to the effect that the submarine was transporting a officer and a civilian who might have been Adolf Hitler and Eva Braun in disguise.
aw140 TIL a pod of dolphins saved a group of swimmers from a great white shark by herding the swimmers together and doing tight circles around them to create a barrier. The dolphins kept this up for 40 minutes until the shark lost interest and was safe for the swimmers to swim to shore.
Zp78D TIL about the Indian Vulture Crisis, in which Indian farmers’ use of a livestock medication led to the near eradication of vulture species and subsequent epidemiological catastrophe, costing the nation US$23bn per year
nV1P TIL that the Yankee Doodle lyrics “Stuck a feather in his hat and called it macaroni” refer not to the pasta, but to Macaroni fashion, a British type of pompous over-dressing.
BrrBb TIL of film director "Uwe Boll", who challenged the five harshest critics of his films, to boxing matches. He fought and won against all five critics (video of fights in comments). Boll's invitations were also open to film directors Quentin Tarantino and Roger Avary.