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TIL SAOCOM 1B is an Earth observation satellite that was launched on August 30, 2020 by the Argentine Space Agency (CONAE):

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16g14 TIL about state adjutants general, who are the commanders of their state's military forces. They are appointed by the Governor in all states and territories that have them (the CMNI and AS doesn't), except for DC where POTUS appoints, and Vermont whose General Assembly elects for a 2-year term.
X0LPQ TIL that Buzz Aldrin (Apollo 11) was nicknamed "Dr. Rendezvous" by other NASA astronauts. Aldrin—with an MIT PhD—knew that it was not a compliment.
v1y48 TIL of bioengineering professor Manu Prakash, who invented a foldable microscope and centrifuge that cost under a dollar combined. The implications of these tools for impoverished countries are huge.
D1xnr 22 veterans commit suicide every day
l7RyN TIL that Billy the Kid was promised a pardon for his crimes if he testified for a murder he witnessed. A pardon that was eventually denied in 2010.