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TIL the most dangerous frequency is at the median alpha-rhythm frequencies of the brain, 7 hz. At high volumes, infrasound can directly affect the human central nervous system causing disorientation, anxiety, panic, bowel spasms, nausea, vomiting, and eventually organ rupture.

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gM4YD TIL: In the 1960’s The FAA intentionally created 1200+ Sonic Booms over Oklahoma City in a six-month span to test the effect on residents and wildlife in anticipation of commercial supersonic flight
VxVG TIL about the Old Man, a 30 foot tree stump that has been floating around vertically on Crater Lake for 130 years and scientists aren’t really sure why.
mOeO TIL a lawyer in Toronto fell to his death in 1993 after he threw himself against a window on the 24th floor of a building in an attempt to prove to a group of visitors that the glass was “unbreakable”, an act he had done twice before. The glass did not break, but popped out of the window frame
Gmeg TIL that Tilly Smith, 10 years old British schoolgirl, saved her family and 100 other tourists from the 2004 Asian tsunami, by recognizing signs of tsunamis she had learned in a geography lesson two weeks before.
rNGly TIL that when your body burns fat 84% of it gets converted to carbon dioxide and exhaled through your lungs. The remaining 16% is converted into water that becomes urine and sweat.