The four levels of rooms center on a beautiful courtyard with a glass ceiling to let light shine in.

VOA: special.2009.01.11

They found the highest levels of solar activity cause small, but far-reaching effects on weather systems around the world.

VOA: special.2009.09.29

Later,she raised money to help poor immigrant women who had been passengers on the lower levels of the Titanic.

VOA: special.2010.03.08

The team found levels of lead as high as thirty-two thousand parts per million in tests on some paint samples from Ecuador.

VOA: special.2009.08.31

Researchers at the University of Western Ontario carried out a similar study involving levels of cortisol in hair.

VOA: special.2010.10.12

But he says there is no reason to think that the ice levels will return to the levels of thirty years ago.

VOA: special.2009.10.27

The researchers added carbonic anhydrase genes to plants that do not react to higher levels of carbon dioxide.

VOA: special.2010.01.26

More than one thousand children living nearby were reported to have high levels of lead in their blood.

VOA: special.2009.08.31

They say the levels of Mycobacterium avium were one hundred times higher than that of normal household water.

VOA: special.2009.10.13

His team found that levels of stress were highest among adults between the ages of twenty-two and twenty-five.

VOA: special.2010.08.03

Helen Murray Free invented self-testing equipment that lets diabetics measure their own blood levels of glucose at home.

VOA: special.2010.11.09

It enables the user to control the speed and sound levels of orchestral music playing on a computer.

VOA: special.2011.05.11

He compared obesity rates and physical activity levels of women who had been in high school before and after Title Nine took effect.

VOA: special.2010.03.04

They say levels of a protein called Shh need to remain largely unchanged in a developing fetus for the palate to develop correctly.

VOA: special.2009.12.22