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TIL In WW2, The Allies estimated German average monthly tank production using statistical analysis of their serial numbers. They were off by one.

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Z8KwG TIL that at the end of the bronze age (1200-900 BCE). Several ancient civilizations were invaded and in some cases conquered by an obscure force of "Sea Peoples". They were a contributing factor to the Bronze age collapse and their origin is still mostly unknown.
vyVB TIL the fastest jet ever produced is the SR-71 Blackbird. It could travel faster than 3.5 times the speed of sound and its top speed is STILL classified.
1aPpP TIL there are prehistoric ritual caves that were visited for more than 10.000 years, making them by far the longest lasting religious temples ever
VpJZ TIL that the world’s biggest and most advanced radio telescope will be built by 2024. It can scan the sky 10,000 times faster and with 50 times the sensitivity of any other telescope, it will be able to see 10 times further into the universe and detect signals that are 10 times older
66Rm TIL India Pale Ale(IPA) was invented not because they thought it taste better or was of better quality than other Ales, it was just the only way they could make beer that would survive the boat trip to India.