And she explains the theory of evolution through natural selection in a way that both children and adults will enjoy.

VOA: special.2009.02.27

Studies support the theory that there are several causes, instead of a single environmental cause or genetic problem.

VOA: special.2009.01.06

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

To test the theory, he asked more than sixty college students to take part in an experiment.

VOA: special.2009.08.18

Others say the evidence is important, but that more evidence is needed to confirm the theory.

VOA: special.2009.01.20

She developed the theory explaining how and why the ozone hole happens over Antarctica.

VOA: special.2009.03.13

She said the discovery "supports the theory that some of life's ingredients formed in space and were delivered to Earth long ago by meteorite and comet impacts."

VOA: special.2009.09.30

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

And,the experiment proved the theory.

VOA: special.2009.03.03

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