Since ancient times, thinkers including the Greek astronomer Ptolemy believed in the existence of a huge continent on the South Pole.

VOA: special.2009.06.03

Others say the activists are independent thinkers who will oppose any politician they see as supporting big government and big spending.

VOA: special.2010.03.06

And,he says that is good news because the world needs creative thinkers to help solve increasingly complex problems in the future.

VOA: special.2009.04.24

This month is the two hundredth anniversary of the birth of one of the most influential thinkers in science history.

VOA: special.2009.02.25

"Bucky" Fuller,as he was known, was one of the most unusual thinkers of the twentieth century.

VOA: special.2010.05.30

One of America's greatest thinkers and writers immediately recognized the importance of "Leaves of Grass."

VOA: special.2009.04.12

Over the centuries,scientific thinkers worked to develop these devices and improve their accuracy and complexity.

VOA: special.2010.09.29

A small group of thinkers,artists, scientists and industrial leaders disappears from society.

VOA: special.2010.06.06

She is still one of the most loved, and hated,American thinkers.

VOA: special.2010.06.06

It shows famous Greek thinkers and scientists.

VOA: special.2010.02.03

He underscores the importance of the state and society being able to identify and encourage talented and critical thinkers, adding that young people should be raised in an atmosphere of intellectual freedom and civic engagement.

VOA: standard.2009.11.12