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TIL a Polish footballer has 4 kidneys; a condition that affects 1 out of 5.5 million. He was diagnosed during a transfer medical

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P1e1g TIL: birds exhibit very jerky movements mainly for depth perception — quickly switching which eye is looking at something enables comparison between viewpoints, much like humans constantly compare views from their two eyes which the brain uses to create a 3D picture.
ovJK TIL that the atomic clocks aboard GPS satellites are programmed to compensate for time dilation due to General Relativity. Otherwise, after just one day, GPS devices would show coordinates that would be off by around 10Km!
VMOnm TIL that after the overthrow of the indigenous monarchy Hawaii was a sovereign nation for 5 years
d8YdZ TIL In the 1780s an Indian king named Tipu Sultan was the first person ever to effectively use Iron cased rockets against the British East India Company. Later in 1800s British adopted this technology and fought with it in Napoleonic wars
wL6Go TIL that Aegilops (a genus of Eurasian and North American plants in the grass family; types of goatgrass) is the longest English word with letters arranged in alphabetical order.