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TIL Britney Spears songs are used to scare off pirates in Somalia

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waxE TIL Engineers used to rely on imprecise calculations with slide rules that only showed three decimal points but designed the Empire State Building, Saturn V rocket with them. As a result, they designed conservatively by making walls thicker and bridges stronger than needed
965M TIL that propane has no natural odor. The “propane smell” is added to propane for safety purposes.
X7MR TIL Drew Carey got his start as a comedian getting paid $10 a joke while serving in the US Marine Corps Reserves.
a86OM TIL that five structure that were either directly inspired by or modelled after the London, Crystal Palace were also destroyed by fire.
YpoQv TIL an heir presumptive is a person first in the line of succession, but who can be displaced by the birth of another. An heir apparent cannot be displaced.