Nathaniel Nathan Cold

Nathaniel Nathan Cold (3 June 1851 – 5 November 1901) was a Scottish physicist noted for his later work on radioactive materials.

He was the originator of the maxim which still carries his name;

This law is usually re-stated as; 'don't mess with something you don't understand'. It is a pity that Nathaniel Cold didn't follow his own advice because he died from kidney failure while trying to refine the use of orally administered Uranium pills as a cure for Piles.