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TIL an African grey parrot named "Nigel," who spoke with a British accent, went missing from his California home. When he was returned 4 yrs later via his microchip to his British-American owner, Nigel was able to speak Spanish & sing bars from the theme of "The Good, The Bad, and The Ugly."

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aO6Z TIL the genome of modern humans contains the DNA from four different hominid ancestors: homo sapiens, Neanderthals, Denisovans, and a fourth species that has yet to be discovered.
X0e7R TIL that in the 1970s and 1980s more than 4,600 hemophiliacs contracted HIV or hepatitis C after being infected by contaminated blood-clotting products.
6Ek58 TIL that a UK documentary once showed video footage of an IRA group using Lybian weapons including a truck mounted Anti Aircraft gun, shooting down a British helicopter. The footage turned out to be from Arma2, a video game. The IRA really did blow up a helicopter in 1994, but with a mortar.
rN1Mx TIL the chemotherapy paclitaxel (Taxol) was first isolated from the bark of the Pacific yew tree. In 1987, anti-cancer effects were seen, but harvesting bark killed the trees. Scientists then raced to (and succeeded) in synthesizing the drug. Approved in 1992, Taxol still treats many cancers today.
wLbBY TIL Sleep difficulties and sleep disorders are the most common comorbidities reported in individuals with ADHD, affecting approximately 73% of children and adolescents with the condition and up to 80% of adults with ADHD.