• 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

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