Professor Stone says the emotional patterns could be linked to changes in how people see the world, or maybe even changes in brain chemistry.

VOA: special.2010.08.03

During the nineteen sixties, medical researchers discovered changes in the brains of people with the disease.

VOA: special.2009.04.07

For several years, many people had recognized the need for changes in the banking system.

VOA: special.2010.09.23

The map identifies changes in genes that may increase the risk in some people.

VOA: special.2010.11.02

But it is no fortune. While waiting outside the city's National Museum for the tourists to emerge, he talks about the changes in his half century of pedaling people around Phnom Penh.

VOA: standard.2010.06.14

(Speech) The former Czech Republic president said the changes in 1989 were "undoubtedly aided by people who,for long years" tried to show the world "the real situation" in what was then Czechoslovakia.

VOA: standard.2009.11.17