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TIL that the CIA suspected the KGB of stealing pipeline software, so they allegedly created a “logic bomb” which resulted in the explosion of a Russian natural gas pipeline equal to 3 kilotons of TNT.

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rJ5y TIL that there is a factory in Japan which can run unsupervised for 30 days at a time. Robots build other robots at the rate of 50 per 24-hour shift. Such factories are called “lights out” factories because no human presence is needed. FANUC has been operating this autonomous factory since 2001.
4kkQJ TIL due its slow rotation around its own axis and its uneven orbital path around the sun, occasionally the sun will appear to reverse its path in Mercury's sky, and reverse again, causing Mercury to sometimes have a double sunrise.
epRO5 TIL about Gemistos Plethon, a 14th/15th century Greek scholar who rejected Christianity and favoured a return of Hellenic paganism in the Byzantine Empire.
Menkm TIL that the "gas pedal" (accelerator) on modern car engines actually first controls the amount of airflow, and then the ECU decides how much gas/petrol is injected.
LkgNv TIL at the Teheran Conference, Stalin proposed executing 50,000–100,000 German officers. Roosevelt, believing Stalin was not serious, joked that "maybe 49,000 would be enough". Churchill ended up storming out of the room and did not come back until Stalin claimed that the proposal was a joke indeed.