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TIL atomic bomb testing has changed our biology

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goEA TIL that the movie “Escape from Tomorrow” was filmed in its entirety in Disney World, without Disney knowing about it. The actors read their scripts off of cell phones to keep themselves hidden.
OodrR TIL in 1947 John Calhoun began a 2-year study of rats in a massive pen. Although 5 females could've produced 5,000 progeny, the population never pass 200. The rats did not scatter but organized themselves into 12 colonies of a dozen rats each. He noted that 12 was the maximum that can live in peace.
947M TIL The animatronic spider used in Arachnophobia was created by none other than Mythbuster’s Jamie Hyneman. It was one of his earliest special effects jobs.
rN1E4 TIL sperm oil(whales) was used in automotive transmissions until the 1970s. When they stopped using it, transmission failures rose significantly.
JYW9m TIL about John Howard Griffin, a journalist who in 1959 took anti-vitiligo drugs and spent 15 hours daily under an ultraviolet lamp to temporarily "become" a black man and travel through the South for six weeks.