Those who ever did mathematics or physics etc do know them though.
Anyone who knows about the Monte Carlo method knows Ulam:
Most in society know about say Pascal for his philosophical/betting ideas than his mathematical contributions:
Or Newton for having an apple fall on his head (gravity) than his (funnily enough disputed just like Ulam) contributions to mathematics:
Or even modern mathematicians/technologists who helped create the theoretical foundational framework for polar codes and 5G technologies like Erdal Arikan (Erdal who???):
Added: I can only think of one really "sung" mathematician: https://www.youtube.com/watch?v=_lf1mB8OZeg
On a similar note, Adventures of a Physicist by Luis Alvarez is also a great read. Among many other things, he and his son proposed the theory that the dinosaurs' extinction was caused by a meteor.
Convergence of Probability Measures,
John Wiley and Sons, New York, 1968.
The result was used in a course I took in measure theory based probability theory. Later
I used the result in one paper to show that a goofy statistical hypothesis test was not trivial.
The URL I've had of the picture of Ulam, von Neumann, and Feynman at Los Alamos during WWII moved, but another copy is at
not famous, praised, or admired, although deserving to be