› added 11 years ago

115

TIL there is a town in Brazil that powers its streetlights by having convicts pedal bicycles attached to generators.

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KY9M9 TIL that there's a reason why smoke alarm tend to need battery replacement at night. As the temperature drops at night, the battery’s chemical reaction slows and the voltage lowers. The internal circuit then detects this as battery needing replacement.
1b1X TIL there were more people in the Americas than in Europe at the time of first contact… 90% were then destroyed by plague
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