He developed the theory of evolution that life on Earth developed through the process of natural selection.

VOA: special.2009.12.16

That theory is known as evolution through natural selection.

VOA: special.2009.02.25

As a result,he was almost upstaged by a younger colleague, Alfred Russell Wallace, who developed the theory of evolution through his own research.

VOA: standard.2009.11.25

On stage,Milner tells the story through music. Darwin's theory of evolution through natural selection inspires some tunes,and episodes in his life inspire others.

VOA: standard.2009.11.25

"Well,there are three basic paths they can go through. The first one is the Standard Model, which is basically the theory of what we know now.

VOA: standard.2010.03.05