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56

TIL about D.U.F.F. (Demonstration Using Flattop Fissions), a NASA project that produced an incredibly small nuclear reactor: K.R.U.S.T.Y. (Kilopower Reactor Using Stirling Technology).

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1pZV TIL that real guns are allowed at both the Democratic and Republican National Conventions, but water guns are banned.
b6kYp TIL that George Halas Jr. was the heir to the Chicago Bears until dying of a heart attack. During a lawsuit over the ownership to the NFL team, his body was exhumed. The coroner found that Halas's internal organs had been replaced with sawdust. His sister, Virginia Halas McCaskey, became team owner.
kO7l4 TIL about Lunar lava tubes - Tunnels under the surface of the moon, kilometers long, hundreds of meters wide. Shelter from radiation and extreme temperatures. Can be used for habitation.
R5D58 TIL As of May 2019, videos were being uploaded to YouTube at a rate of more than 500 hours of content per minute.
WArB TIL; The area code for the International Space Station phone is a Houston area code, 281.