George de HevesyGeorge de Hevesy
(August 1, 1885 - July 5, 1966) was a Hungarian chemist
who was important in the development of the tracer method
where radioactive tracers are used to study chemical processes, e.g., the metabolism
For this he was award the Nobel Prize in Chemistry
When the Nazis invaded Denmark he dissolved the gold Nobel Prizes of Max von Laue and James Franck into aqua regia and placed this reagent on a shelf in his laboratory at the Niels Bohr Institute.
After the war, he returned to find the solution undisturbed and precipitated the gold out of the acid.