On average, rhesus monkeys live about twenty-seven years in captivity, that is,when they live with humans and not in the wild.

VOA: special.2009.09.01

The anti-malarial drug Chloroquine was widely used until recent years when the malaria parasite became resistant to the drug.

VOA: special.2010.04.20

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

Rosalyn Schanzer shows readers the young man who was only twenty-two years old when he left Plymouth,England in eighteen thirty-one.

VOA: special.2009.02.27

He was five years old when he began singing with his brothers in a group called the Jackson 5.

VOA: special.2009.07.05

When she was eight years old, her father took her inside a factory to watch the manufacture of printing presses.

VOA: special.2009.05.10

The scientist says this mission has been planned for many years, but he is not sure when it will happen.

VOA: special.2010.05.25

When she was about four years old, she heard her mother struggling to play a piece of music on the piano.

VOA: special.2010.04.09

Clara Barton really began her life of caring for the sick when she was only eleven years old.

VOA: special.2009.07.26

said the gray-haired woman. "You see,I was nurse to the boy when it happened,and for years afterward I worked in the family.

VOA: special.2010.05.15

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

VOA: special.2009.07.13

Progress on a work plan for securing nuclear materials can be discussed when South Korea holds the next summit in two years.

VOA: special.2010.04.17

The researchers compared these retinal images with pictures taken five years later when the women were eighty-three.

VOA: special.2010.03.09

The conflict began more than twenty-five years ago, when minority Tamils began fighting for an independent homeland.

VOA: special.2009.05.16