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TIL the NASA Saturn V program (rocket for moon landings) cost $34.4B in 2018 dollars over its life. That's compared to the total 2020 NASA budget of $22.6B

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Wkpn9 TIL that scientists discovered sharks that are living in an active underwater volcano. Divers cannot investigate because they would get burns from the acidity and heat.
QgQM TIL English muffins aren’t baked.
PGVL TIL that in 2014, Dallas Police engaged in a six-hour standoff with an empty apartment
GAoM1 TIL there were square halos. These were used in donor portraits, a depiction of the person who commissioned the artwork placed among saints, to mark the contemporary donor.
Jy08 TIL A horse’s heart can weigh more than 7kg and beat at 240 BPM