Darwin's observations showed him that environments can change a little very quickly and a great deal over time.

VOA: special.2009.02.27

Rosalyn Schanzer brings to life the clues that suggested to Darwin that living things evolve, or change,over time.

VOA: special.2009.02.27

The Industrial Revolution of the eighteen and nineteen hundreds was a time of great change for the world.

VOA: special.2011.04.26

These incidents took place during a time of intense social and political change in the United States.

VOA: special.2010.02.25

Something made me change my mind as I looked at the picture for a second time.

VOA: special.2009.07.04

I wish schools should change their start time to eight-thirty or nine a.m.

VOA: special.2010.10.14

During this time, he discovered things he wanted to change in the book.

VOA: special.2009.03.15

But they say the land formation continues to change slowly over time.

VOA: special.2009.04.15

The idea that species change was not new even in Darwin's time.

VOA: special.2009.12.01

Katrin Verclas says she hopes FAILFaire will change this problem over time.

VOA: special.2010.09.13

Some genes change or disappear over time.

VOA: special.2010.02.02

What we're trying to do here is to change the system in the United States from one that is based on the time that is spent in the seat to one that is based on your actual accomplishments."

VOA: special.2010.02.25

"It's a big deal. How big a deal you have to measure piece by piece but clearly it is the first major change in our health care system since nineteen sixty-five so that's a long time coming."

VOA: special.2010.03.27

The Americans this time should change their policy, the change which we have been promised by President Obama."

VOA: standard.2009.11.18