They say this can provide important information about how ocean conditions change over time and how corals react to climate change.

VOA: special.2010.08.10

Doctors say that over time the damage interferes with the natural exchange of oxygen and carbon dioxide in the lungs.

VOA: special.2010.06.23

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

VOA: special.2009.02.27

Yet he thought that slavery would die out naturally over time -- and that outsiders should not force southerners to end slavery.

VOA: special.2009.02.09

Studies have shown that over time, most humans need eight to eight and a half hours of sleep for the best health.

VOA: special.2009.08.26

Its reddish color and changes in brightness over time make the planet an unforgettable sight.

VOA: special.2010.07.28

Some experts suggest taking pictures of moles and dating the images to compare over time.

VOA: special.2010.07.06

Over time,high blood sugar can lead to blindness, kidney failure, heart disease and nerve damage.

VOA: special.2010.01.13

The borrowers are able to save money and pay back the loan over time.

VOA: special.2010.06.16

And for them, they don't have time for us to start over."

VOA: special.2010.02.27

Many Neanderthal bones and objects have been found there over time.

VOA: special.2010.12.07

And over a period of time her grades fell completely.

VOA: special.2010.04.22

So,to get a sense of what the regional moisture patterns have been, dryness and wetness over such a long period of time in great detail, I would call it a kind of victory for paleoclimate science."

VOA: special.2010.05.25

But over time, we slowly got used to it and we try to make it as kid friendly as possible because kids are what we gear towards and they're the most important people that come through."

VOA: special.2010.07.28