Last week,Harvard University researchers reported that people who travel are three times more likely than others to develop deep vein thrombosis.

VOA: special.2009.07.14

It has high mountains. It has valleys formed by ancient ice that cut deep into the Earth millions of years ago.

VOA: special.2009.01.07

You can be in deep water, for example, if you invest in stocks without knowing anything about the stock market.

VOA: special.2009.05.10

They showed that patients who received deep brain stimulation had better control of their symptoms than those who only took medicine.

VOA: special.2009.02.03

Treasury Secretary Tim Geithner wrote in the Washington Post that the deep financial crisis is close to the end.

VOA: special.2010.04.16

One of these is deep-six. It means to hide something or put it where it will not be found.

VOA: special.2009.05.24

And I began to feel such pain again." Lena Horne had a rich, raw,deep voice that was famous for blues singing.

VOA: special.2010.05.14

NASA scientists hope to extend their search for water as deep as five meters beneath the surface of the moon.

VOA: special.2009.09.30

In a separate project, scientists identified seven new species of bamboo coral in deep waters near the Hawaiian Islands.

VOA: special.2010.08.10

There is deep opposition between people who support nonreligious government policies and those who want religious values to be considered.

VOA: special.2009.05.22

NASA used its Lunar Crater Observing and Sensing Satellite,or LCROSS, to look for water deep beneath the lunar surface.

VOA: special.2009.12.30

Deep into that darkness peering, long I stood there wondering, fearing,Doubting, dreaming dreams no mortal ever dared to dream before;

VOA: special.2010.10.31

He landed in California. He left a hole so deep that to this day it is known as Death Valley.

VOA: special.2009.11.28

So the controversy is how do you do that." He says the current debate has deep roots in the Constitution.

VOA: special.2011.07.15