He is best known for being a co-discoverer of the structure of the DNA molecule and for his significant contributions to the field of molecular biology - but Francis Crick was no biologist. Well, not to begin with, anyway.
Crick actually began his scientific career with a degree in physics from University College London. During World War II, he worked as a scientist for the Admiralty Research Laboratory, leading on the design of magnetic and acoustic mines. After the war had ended, Crick pivoted from physics to biology - a transition which he described as "almost as if one had to be born again”.
Francis Crick is proof that a career change can be a good thing (but we can’t guarantee you’ll win the Nobel prize for it.)