› added 12 years ago

399

TIL that American Indians weren’t considered citizens of the U.S.A until 1924.

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DQD1g TIL that due to airflow, all single rotor helicopters have the same speed limit 250 mph (402 km/h)
P1p9n TIL "AC/DC" is an abbreviation meaning "alternating current/direct current" electricity
aEjL TIL that a United States Senator once interrupted a NATO debate on nuclear weapons to complain about a tariff on chickens.
x6M8o TIL that humans have been performing dentistry since 7000 BC, which makes dentistry one of the oldest professions.
laoV TIL The two forward slashes in website URLs are useless, and Tim Berners-Lee has apologized for it’s design.