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TIL electricity was first installed in the White House in 1891. It was such a new concept that President Benjamin Harrison and his wife both refused to touch light switches due to their fear of electrocution so the White House staff had to follow them around and turn the lights off and on for them

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ADLV4 TIL Alexei Leonov, the first man to perform a spacewalk, almost wasn't able to get back in the capsule as his suit had expanded in the vacuum of space. Many problems plagued the mission including a poor landing 240mi off course forcing the 2 man crew to survive for 2 days in the freezing wilderness.
VM7vB TIL Angelina Jolie had a mastectomy due to having an 87% risk of breast cancer and a 50% risk of ovarian cancer. Her chance of developing breast cancer dropped from 87% to under 5% after the mastectomy.
8a6jK TIL Kenneth Copeland is an American televangelist with a net worth of $760 million. The Copelands live in a $6.3 million mansion as part of their parsonage allowance.
oR5kY TIL 120 starlink satellites fall out of orbit per month producing 30 kilograms of aluminum oxide each which eats away at the ozone layer and these oxides have increased 8 fold in the atmosphere since 2016
Meb67 TIL this yellow-pigmented male northern cardinal is most likely a genetic mutation that renders the pigments the bird draws from foods making it appear with yellow coloration rather than red. This is called xanthochromism; in addition to cardinals, it has also been seen in rose-breasted grosbeaks.