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ANae4 TIL If it wasn't for the fact that ice is less dense than water, and therefore floats, life on Earth would not exist.
epDgn TIL The 'lead-crime hypothesis' argues that an increase in lead levels in the blood, due to leaded petrol, was a major driver in the increase in crime in the US. Its subsequent banning also correlates with a significant decrease in crime.
woKjo TIL There is a hotel and spa in Czechia where you can get a bath in radioactive water.