Over the years, big oil and gas companies recovered much of the easily reached supplies of gas in America.

VOA: special.2009.10.23

The subject is pain. Over the years,however, medical studies have led to new hope for patients who are hurting.

VOA: special.2010.05.04

Over the years, the program has provided millions of dollars to help African American students get money for college.

VOA: special.2009.11.01

Over the years, he has worked with farmers and seed companies and developed more than eighty seed typesfor Africa.

VOA: special.2009.06.16

Over the years,researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.

VOA: special.2009.07.15

Over the years, he has worked with farmers and seed companies and developed more than eighty seed types for Africa.

VOA: special.2009.07.07

He was forty years old. Over the years,historians and medical experts have tried to explain the cause of Poe's death.

VOA: special.2009.02.02

For example,Wal-Mart has received criticism over the years for its labor policies and lack of environmentally friendly efforts.

VOA: special.2009.07.17

Over the years, as mothers and American women in general became more independent, more and more of them entered the job market.

VOA: special.2009.05.04

This week,our subject is mothers and how their image has changed over the years in film and television.

VOA: special.2009.05.04

Over the years, when its sports teams have done well, Pittsburgh has been called the "City of Champions."

VOA: special.2009.07.13

Mister Miller says that what matters most is not whether the rank of cities changes over the years.

VOA: special.2009.03.27

Over the years, they have been sung and played in every possible way -- from jazz to country.

VOA: special.2009.02.15

the name given the original series. The series expanded over the years to one hundred seventy-five books.

VOA: special.2009.08.24