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Cachet and stamp depict Max Planck, while the postmark is of Otto Lilienthal, who pioneered the use of gliders. Stamp is part of series, "Men from the History of Berlin."
Depicts Justus von Liebig, known for his work in agricultural and organic chemistry.
Cachet depicts Otto Hahn's equipment and the nuclear fission of uranium atoms. Stamp shows Hahn's diagram of the splitting of the uranium nucleus. Hahn was the Nobel Prize Winner for Chemistry in 1944.