TIL The Horror film "Unfriended", on the theme of cyberbullying is told almost entirely through a screencast of a MacBook. Production was 16 days total and at least one full, 80-minute-long take was filmed, with each actor in separate rooms with separate computers
TIL of Lady Lucy Houston, a British philanthropist who, after WWI, recognized the need for a strong Air Force... when the British government refused, she funded development of what became the Spitfire. She passed before WWII, and never saw how much that investment paid off.
TIL a defector from the Russian GRU revealed that if war broke out with the US, Russian agents planned to poison the Potomac River with chemical or biological weapons, targeting the residents of Washington, D.C.
TIL The Vatican has its own telescope staffed by priests, and has previously been given awards for the pursuit of scientific research.