They believe the simian immunodeficiency virus,S.I.V., probably crossed from chimpanzees to humans in the last one hundred years.

VOA: special.2009.09.08

Stephen Hillenburg,says he did not expect the series to last longer than one season, much less ten years.

VOA: special.2009.08.21

That leaves just four. I want to see the last one fall before it gets dark.Then I'll go,too."

VOA: special.2009.08.01

Pirates have attacked at least sixty-one ships so far, compared to six for the same period last year.

VOA: special.2009.04.25

They also say the frog is one of the last invertebrates to have its genetic information identified.

VOA: special.2010.06.29

The last time the United States Education Department asked young people how long they took to finish college was in two thousand one.

VOA: special.2009.07.23

One of the last decisions of its term will likely cause employers to take greater care in how they choose workers to promote.

VOA: special.2009.07.03

His mother and father spoke to reporters last week after he became one of the November Nine.

VOA: special.2010.07.26

This week,Americans said goodbye to the last son of one of the nation's most politically influential families.

VOA: special.2009.08.29

Last month,Mrs.Obama welcomed almost one hundred local students to the first event in the South Lawn Series.

VOA: special.2010.06.07

Yet growers expect their current crop to be almost ten percent bigger than the last one.

VOA: special.2011.02.11

The report shows that just over one-third of charitable donations last year went to religious organizations.

VOA: special.2009.11.02

Last month,Rita Levi-Montalcini became the first Nobel Prize Laureate to reach the age of one hundred.

VOA: special.2009.05.13

One of them,the Apollo-11, traveled to the moon just seven months after the last X-15 flight.

VOA: special.2010.07.07