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TIL Braun introduced a butane powered curling iron in 1982

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D1rjr TIL about The Tragically Hip, "the most Canadian band in the world". They have sold more albums in Canada than global bands like U2, and have had nine albums in the #1 spot on Canadian charts, but are virtually unknown outside of Canada.
p8xle TIL 18th century sailors and pirates were adept at astronomy and maths, e.g. trigonometry and logarithms. They even took classes and sat exams on these topics. The skills gained by studying such technical fields helped them navigate the open seas, escape authorities, chase down pirates, etc.
OoAk4 Researchers are trying to create reflectors that can divert the sun's light to power plants on the surface of the planet at all hours of the day and night.
GYDZQ TIL that Skrillex's 'Scary Monsters and Nice Sprites' acts as a mosquito repellent. A study found that females mosquitos exposed to the album attacked hosts much later than their non-exposed peers
a8Lx0 TIL in 1945, at 59 years old, Albert Stevens was misdiagnosed with terminal stomach cancer, and as a result was secretly injected with 131 kBq (3.55 μCi) of Plutonium as part of a human experimentation project by Joseph Gilbert Hamilton. It was later discovered the "cancer" was an inflamed ulcer.