How was Pierre Curie awarded the Nobel Prize?

Name: Pierre Curie. 
Country: France.
Date of Birth: 15 May 1859.
Died: 19 April 1906.
The subject of Study: Curie’s law magnetism, Pitchblende Polonium balance.
Noble Prize Year: Nobel Prize for Physics in 1903 for their research on the discovered radium and polonium in their investigation of radioactivity.