Piet Hein
20th-century Danish mathematician, inventor, designer, writer and poet (1905-1996) · Denmark · On the map · Academics · Died at 90
Piet Hein was a Danish polymath, often writing under the Old Norse pseudonym Kumbel, meaning "tombstone". His short poems, known as gruks or grooks, first started to appear in the daily newspaper Politiken shortly after the German occupation of Denmark in April 1940 under the pseudonym "Kumbel Kumbell".
Piet Hein is read about 66 times a day, in 34 languages.
A typical day, 30 days to 6 November 2026
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He also invented the Soma cube and the board game Hex.
