Mizz Blackburn and Mister Szostak discovered the special system of genetic information in the telomeres that protects the chromosomes from ruin.

VOA: special.2009.10.07

But she says there is much evidence that nicotine in tobacco smoke affects the nervous system, and child development and behavior.

VOA: special.2009.01.13

An object in the solar system could be identified if it appeared to move from its place in the earlier photograph.

VOA: special.2010.07.11

He says they might be trying to increase their dopamine levels to make up for the deficits in their reward system.

VOA: special.2009.09.16

He says they might be attempting to increase their dopamine levels to make up for the deficits in their reward system.

VOA: special.2009.09.29

President Obama has signed legislation to make the biggest changes in the health care system in forty-five years.

VOA: special.2010.03.24

And now Ms.Rhee appears in the film "Waiting for 'Superman,'" a documentary about problems in the educational system.

VOA: special.2010.10.21

But Congress has put more into the budget of the national park system in the past three years.

VOA: special.2009.09.28

This week,we tell about the biggest system of freshwater lakes in the world, the Great Lakes between the United States and Canada.

VOA: special.2009.11.11

But he said the nation must not forget the near-collapse of the banking system in two thousand eight without fixing its causes.

VOA: special.2010.04.16

They found that TGF-beta helps to heal wounds and is important in the body's defense system against disease.

VOA: special.2009.01.27

For example, the Great Barrier Reef in Australia is the largest coral reef system in the world.

VOA: special.2009.04.22

In the American political system, whoever wins the most popular votes in a state usually gets all the electoral votes of that state.

VOA: special.2010.03.11

In the American presidential system, whoever wins the most popular votes in a state usually gets all the electoral votes of that state.

VOA: special.2010.03.04