Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth.

VOA: special.2011.06.01

Borman and Lovell proved that humans could survive in space for the time needed to get to the moon and back.

VOA: special.2009.07.01

Doctor Cawkwell told VOA that fibromyalgia is a very mysterious disease that has proved difficult to diagnose and treat.

VOA: special.2011.08.02

But any concerns that parents would not want to buy it for little girls were soon proved wrong.

VOA: special.2009.04.06

But the cattlemen believed they had proved that cattle could be walked long distances to the railroad.

VOA: special.2010.03.18

Hero's family decides to make Claudio believe that she is dead until her innocence can be proved.

VOA: special.2010.01.06

They had proved that people could live and work in space for the time it would take to get to the moon and back.

VOA: special.2009.06.24

"The Great Gatsby" proved that he had become an expert in the art of writing.

VOA: special.2010.11.28

But an investigation proved that the company and the Teamsters had cheated in the election.

VOA: special.2009.09.06

Scientist Ian Wilson at the Scripps Research Institute in California says the antibodies proved highly effective in laboratory mice exposed to deadly levels of virus.

VOA: special.2009.03.04

And it proved that experienced pilots had the skills necessary to fly in space.

VOA: special.2010.07.07

If it does not hold water, then it is weak and cannot be proved.

VOA: special.2009.05.10

And they had proved that people could both live and work in space.

VOA: special.2009.06.24

Harvard researcher David Rand says the most successful behavior proved to be cooperation.

VOA: special.2009.10.21

He proved this when he joined the American navy during World War One.

VOA: special.2010.05.30

But they proved to be just the beginning of her many successes.

VOA: special.2009.11.08

He not only showed humanity how to get more food from the Earth, he proved that farming has the power to lift up the lives of the poor."

VOA: special.2009.11.10

He proved wrong those who believed nebulae lay inside the Milky Way.

VOA: special.2009.04.29

Recently,two men in Madagascar proved it can be done with extraordinary results.

VOA: special.2009.10.30

Russia is first in what are called "proved reserves" of natural gas.

VOA: special.2009.10.23

Schirra and Stafford proved that spaceships could link up while in orbit.

VOA: special.2009.07.01

Men would fly the Mercury spacecraft only after it was proved safe.

VOA: special.2009.06.17

Yet,they proved that long-distance travel across the United States was possible.

VOA: special.2010.01.11

You proved that the will of the people is above everything.

VOA: special.2011.02.12

The words of Jacob Riis' editor proved to be very true.

VOA: special.2010.08.01