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Who discovered it- William Ramsay and Morris Travers
===Where and how produced- Having discovered the noble gas argon, extracted from air, William Ramsay and Morris William Travers of University College, London, were convinced this must be one of a new group of elements of the periodic table. They decided others were likely to be hidden in the argon and by a process of liquefaction and evaporation they hoped it might leave behind a heavier component, and it did. It yielded krypton in the afternoon of 30th May 1898, and they were able to isolate about 25 cm3 of the new gas.  Krypton is obtained from production of liquid air. Around 8 tons of krypton is produced each year world wide ===

Unusual facts-
[|http://www.chemicool.com/elements/krypton.html#facts] [] []