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TIL that the discovery of viruses started from a mysterious disease that affected tobacco crops in the Netherlands at the end of 1800s. A Dutch microbiologist named Beijerinck proved that filtrated sap from plants was still infectious, and called it "contagious, living fluid".

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x8lg TIL there exists a condition that is the opposite of paranoia. Pronoia is the delusion that a massive conspiracy exists to aid you.
Rdrl TIL that Warner Bros held two test screenings of its animated movie “Thumbelina”. The first time around, the audience reaction was flat. For the next test, they prefaced the exact same footage with the Walt Disney logo. The test scores soared
j6o0v TIL about the White-Throated Sparrow. A species of bird that has 4 distinct sexes across 2 color morphs.
5YwLr TIL voice actress Kathryn Beaumont voiced Alice from "Alice in Wonderland" at age 13, and again at age 64 for "Kingdom Hearts".
9Yj5G TIL, American pilots flew P-51 Mustangs in Very Long Range misisons operating from the island of Iwo Jima during WW2. These 7+ hour missions involved flying 3 hours across the open Pacific to targets in Japan and then 3+ hours return flight. Threats included bad weather, flak, enemy planes, etc.