This is not the first study to show a link between deforestation and malaria, but Olson says her study is notable because of the rigorous way Brazilian health officials gathered the malaria data.

VOA: standard.2010.06.17

But now the first worldwide study warns that one in six of the many different kinds of mangroves could disappear.

VOA: special.2010.04.20

The study is said to be the first to examine in detail measurements of bone strength instead of bone density.

VOA: special.2009.03.10

The two groups were retested four years later, and the study compared the results with the first test.

VOA: special.2009.10.21

She says the study was the first to compare the economic effects of different kinds of smoking bans.

VOA: special.2009.05.27

The study found that smokers who quit had a seventy percent increased risk of developing the disease in the first six years.

VOA: special.2010.01.13

The study is described as the first to demonstrate the indirect spread of happiness.

VOA: special.2009.01.21

At first,the study involved about five thousand people in the American state of Massachusetts.

VOA: special.2009.12.22

And we will tell about a study that confirms the importance of first impressions.

VOA: special.2009.11.24

The report is said to provide the first complete study of American bird populations.

VOA: special.2009.05.12

"Our study showed for the first time a clear difference between oxygen and air in the treatment of acute cluster headache.

VOA: standard.2009.12.17

Ruhli and his team of researchers at the Swiss Mummy Institute have just completed the first feasibility study of how they could use the technology to reveal a mummy's secrets, without damaging the mummy.

VOA: standard.2010.05.05