They can even map a pathogen's genetic code, which changes from generation to generation.

VOA: standard.2010.05.05

Doctor Ruhli says researchers used this method to study changes in the tuberculosis bacteria from two thousand year-old mummified tissue.

VOA: special.2010.06.29

But other doctors say they worry that the changes will reduce testing and lead to more women dying from breast cancer.

VOA: special.2009.11.18

This way,they can observe changes in the structure of a deadly organism from one generation to the next.

VOA: special.2010.06.29

Some scientists now believe that tension headaches may result from changes among brain chemicals such as serotonin.

VOA: special.2010.03.30

The Doppler effect explains changes in the length of light waves or sound waves as they move toward you or away from you.

VOA: special.2009.04.29

But she decided to tell about political changes in the United States from the point of view of someone who had never investigated the subject.

VOA: special.2010.12.10

Ultraviolet light from the sun changes a substance in the skin into vitamin D.

VOA: special.2009.04.21

Those changes include water shortages which could increase from rising temperatures in Earth's atmosphere.

VOA: special.2009.01.20

These changes will require new loans to come directly from the Department of Education.

VOA: special.2010.04.15

Those individuals suffer from diseases caused by mutations or changes in genetic material.

VOA: special.2010.03.23

Those changes include water shortages which could increase from global warming.

VOA: special.2009.03.23

Or whether you take a very hard line against them to try to force changes coming in from below within the government.

VOA: standard.2009.08.14

Does it mean it's not doable? I believe it is doable, but it requires some basic changes, both from the Afghan government and from the international community."

VOA: standard.2009.10.23

This is the first global conference that aims to tackle the problems that result from climate change and devise strategies to help nations adapt to these changes.

VOA: standard.2009.08.31

Despite swirling changes in jazz over the decades, Blue Note has managed to stay afloat with distinguished players, from its earliest years with stride pianist James P.Johnson;

VOA: standard.2009.12.25

However,given that there is at least some evidence for positive effects from some of these lifestyle changes, plus other benefits apparently unrelated to cognitive decline, Burke offered some recommendations.

VOA: standard.2010.06.17

A statement from fiscally-conservative Democrats who forced changes in House legislation said they are committed to meaningful reform, but reiterated concern that legislation not add to the federal deficit and control health costs in the long-term.

VOA: standard.2009.09.10