Ernest Rutherford was a pioneering scientist born in New Zealand in 1871. Through his experiments, he discovered that atoms have a tiny, dense nucleus and discovered different types of radiation. He established the Rutherford model of the atom with electrons orbiting a central nucleus. Rutherford also discovered the concept of nuclear half-lives and was the first to achieve nuclear transmutation. His discoveries fundamentally changed scientists' understanding of atomic structure and laid the foundations of nuclear physics.