Charles Darwin developed the theory of how living things develop from simpler organisms over long periods of time.

VOA: special.2009.02.25

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

VOA: special.2009.12.16

In his early years, Mister Galbraith was greatly influenced by the economist Thorstein Veblen and his book, "The Theory of the Leisure Class."

VOA: special.2011.05.01

Today,almost all scientists accept the theory of evolution.

VOA: special.2009.02.25

David Sarnoff developed the theory of broadcasting.

VOA: special.2010.01.31

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

"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

The former priest says the theory of evolution is consistent with his Christian faith.

VOA: standard.2010.04.05

Also,the broken windows theory did not fully investigate the exact conditions of disorders that appeared to lead to crime.

VOA: special.2009.03.03

His theory of Martian life became so complex that he made maps of cities and waterways on the planet.

VOA: special.2010.07.11

Another theory says that the stress of having to pay constant attention to survive leads to Third Man hallucinations.

VOA: special.2010.02.24

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

His theory was that Martians were trying to bring water to the warm areas near the equator of the planet.

VOA: special.2010.07.11

Recent studies also support a theory that a combination of genes is linked to the development of lupus.

VOA: special.2009.04.14