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

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

VOA: special.2010.02.24

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

Yet it was the work of naturalist Alfred Russel Wallace that pushed Darwin to finally release his theory.

VOA: special.2009.12.01

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

VOA: special.2009.04.14

One theory is that the shape developed over the ages to improve this shark's sense of smell.

VOA: special.2010.08.03

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

VOA: special.2009.08.18

It was not until eighteen fifty-eight that Darwin was forced to release his theory to the public.

VOA: special.2009.02.25

One theory is that the military could object if the ruling party looks for friendship with South Korea to help save North Korea's economy.

VOA: special.2010.10.02

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

VOA: special.2009.01.20

But Professor Gaechter says his team's theory was that punishment has only low costs because it needs to be used rarely and works as a threat.

VOA: special.2009.03.03

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

His theory was that the devices and body should remain firm, allowing the strings to vibrate longer and sustain a sound.

VOA: standard.2009.08.14

That is just theory,he says. He says he has to go out to garden with them.

VOA: standard.2010.04.01