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Spot the Easter eggs.

Source (Clockwise starting top left): Richard Pohle - WPA Pool/Getty; Tour de France; Bank of England; Chrome; u/lsbsqvd via Reddit; Google

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Just before Easter, the Bank of England revealed the design of its latest £50 note, the reverse of which features a portrait of the code-breaker and computing pioneer Alan Turing.

In addition to the standard security features (holographic patches, foil ornaments, ultraviolet text, etc.) the note includes a slew of references to Turing’s life and work, including: a ticker tape of his birth date in binary code; sunflower spirals relating to his morphogenetic research; and technical drawings for the British Bombe that helped crack the Nazi’s Enigma code.