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TIL Subway’s iconic “Five Dollar Footlong” was birthed in two little Subways inside of the Jackson Memorial Hospital in Miami.

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d8BJ8 TIL The Earth's rotation and speed changes with the weather and geological events. This means atomic time and solar time may not be identical. Sometimes leap seconds are needed for an adjustment. On 31 Dec 2016, a leap second was added, and the time 23:59:60 existed.
69BoW TIL words that describe themselves - "letters" is made of letters - are called autological
EAmV TIL of the 1833 Leonids meteor shower, the largest one ever recorded estimated at 240 000 “shooting stars” per hour (~67 every second) radiating from Leo constellation over a 9 hour period. The event had such an impact on society that it was used to date people with no birth certificate.
0w97L TIL of the "Hydraulic Empire" theory. It states that civilizations developing in areas with low abundance of water are fated to develop regulating systems and ultimately despotism, and that Europe developed republicanism due to a large excess of it.
woVGo TIL The Dark Knight trilogy director Christopher Nolan based his characterization of Bruce Wayne on Teddy Roosevelt, the 26th president of the United States. To Nolan, both characters overcame great personal loss and a traumatic childhood by reinventing themselves and personally taking on crime.