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

His idea started when he heard two religious workers playing music for free in New York City's underground transportation system.

VOA: special.2009.07.31

His idea for the original drawing came from a piece of music by the English composer Ralph Vaughn-Williams.

VOA: special.2009.09.02

It was his idea for Ella to record the now famous series of record albums called the "Songbooks."

VOA: special.2010.07.04

The president's feelings were hurt when none of the party leaders thought that his idea was important.

VOA: special.2009.03.26

During his long life, he discussed his idea about technology and human survival.

VOA: special.2010.05.30

Bucky Fuller did not give up his idea of doing more with less.

VOA: special.2010.05.30

Charles Darwin developed his idea slowly over more than twenty years.

VOA: special.2009.02.25

He called his idea "dymaxion."

VOA: special.2010.05.30

He kind of grew out on his own. It was his idea to dress up."

VOA: standard.2010.07.23

Today,Feiler is cancer-free. But he says his idea has caught on, and he believes that his book, The Council of Dads, and the website councilofdads.com is inspiring similar groups to form wherever dads seek strength in the fellowship of fathers.

VOA: standard.2010.06.19

Robert Fulton would say for the rest of his life that he had no idea why he said such a thing.

VOA: special.2009.01.14

Soon after his building was finished, builders in Chicago and New York City began copying and improving on the idea of building up.

VOA: special.2010.03.31

A businessman named Nathan Burrell and some of his colleagues came up with the idea during a business trip to Agogo three years ago.

VOA: special.2009.06.29