Piet Hein (December 16, 1905 - April 17, 1996) was a scientist, mathematician, inventor, author, and poet, often writing under the Old Norse pseudonym "Kumbel" meaning "tombstone". His short poems, gruks (or grooks), first started to appear in the daily newspaper Politiken shortly after the Nazi Occupation in April 1940 under the signature Kumbel Kumbell.
Piet Hein popularized the use of the superellipse in architecture, urban planning, and furniture making, and he invented the super-egg or superellipsoid based on the superellipse.
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