Foto de stock - Nov. 11, 1976 - 90th Birthday of Karl Ritter von Frisch: On November 20th 1976, Karl Ritter von Frisch, professor for zoology and comparative anatomy, will become 90 years old. The famous scientist, who was born in Vienna and now lives in Munich, proved that fishes can distinguish colors and that bees orient themselves by the polarized skylight. Karl Ritter von Frisch studied in Vienna and Munich and lectured in Rostock from 1921, from 1925 in Munich and from 1932 in Breslau. From 1946 in Grz and from 1950 to 1958 again in Munich at the Institute for Zoology. He wrote eight books about biology (his latest called 'Animal Architecture', 1974, was translated into English, French and Italian). He received 30 international awards, is six time an honorary doctor of several universities and was awarded the Nobel Prize in 1973 for his research about the language of bees. Our picture shows Karl Ritter von Frisch at his home in Munich. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com)