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TIL There are 5 Ages of the Universe. We are in the second (the Stelliferous Era), which is dominated by galaxies and new stars. But during the Degenerate Era, there will be no fuel for new stars, leaving only stellar corpses like white and brown dwarfs, neutron stars, and black holes.

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4kN76 TIL that the novels of Brett Ellis, author of American Psycho, occupy a shared universe. Patrick Bateman first appears in 'Rules of Attraction', then in 'Glamorama' (in which he is noted as having "strange stains" on the lapel of his Armani suit) and even appears alongside Ellis in 'Lunar Park'.
dDYE7 TIL an embryo conceived in 1992 was thawed and resulted in the successful birth of twins 30 years later
xVndk TIL Dusty Hill from ZZ Top wanted to feel "normal" after their "Worldwide Texas Tour". So he cut his hair, got a job at an airport, went by the name of "Joe" and would go out on Friday nights with coworkers so he could feel "grounded".
v17VB TIL Tu Youyou discovered artemisinin and dihydroartemisinin, used to treat malaria, a breakthrough in twentieth-century tropical medicine, saving millions of lives. She is described as “almost completely forgotten by people”.
a8Ewb TIL the Los Alamos National Laboratory has a guide for what to do if you come across a nuclear-powered cardiac pacemaker [PDF]