What is Marie curie's main discovery?

Answer 1

she , along with her husband perrie currie did a lot of work of Radioactivity. they also got a noble prize on their work. she discovered a radioactive element RADIUM

Answer 2

Marie Curie's main discovery was the identification of the elements polonium and radium, which led to the development of the theory of radioactivity. Her pioneering research paved the way for advancements in nuclear physics and medical treatments using radiation.