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TIL the character Zapp Brannigan on Futurama was written specifically for Phil Hartman to play. After Hartman died, Billy West took the role but played the character’s voice and mannerisms as a tribute to how Hartman might have played it

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Ooboe TIL that When written down, the word ‘almost’ is ALMOST the longest word in the English language to have all of its letters in alphabetical order. It comes second to the proper noun Aegilops (which many do not consider as the winner because it is a proper noun).
QJe7E TIL the difference between detonation and deflagration. Detonation is a supersonic chemical reaction in the explosive. Deflagration is a subsonic chemical reaction diffused by heat.
ENQd TIL If a Helicopter’s engines fail midair they use a state of flight called ‘autorotate’, which allows them to land safely. This system uses air going up towards the main rotors as the chopper is falling; causing the main rotors to spin and generate enough lift for a controlled emergency descent.
e0LBn TIL of Gudrid Thorbjarnardóttir, Icelandic explorer, who sailed to America around 1000ad. She was the first European to give birth there. She also sailed across North Atlantic eight times between Greenland, Iceland and Norway. Later in her life she made a pilgrimage to Rome and back.
x6BZb TIL David Attenborough, as a young TV producer, was instrumental in tennis balls being the colour they are today.