Now, a group of research scientists says it has found evidence of a similar event that happened about 13,000 years ago.

VOA: special.2009.01.20

It has high mountains. It has valleys formed by ancient ice that cut deep into the Earth millions of years ago.

VOA: special.2009.01.07

The report says not one country has met all the biodiversity targets that were set eight years ago.

VOA: special.2010.05.25

The United States has lost more than three and a half million jobs since the recession began more than a year ago.

VOA: special.2009.02.28

The prize in economic sciences has gone to sixty-three men since it was first awarded forty years ago.

VOA: special.2009.10.16

This museum has a large display of southern furniture that was used over two hundred years ago.

VOA: special.2010.07.09

What happened in New York a week ago has added to calls for new laws to deny gun and explosive purchases to suspected terrorists.

VOA: special.2010.05.08

It was discovered in Uganda ten years ago and has spread in Africa and now Asia.

VOA: special.2009.09.22

Ms.Potter says the Archives has public land records if a family owned land many years ago.

VOA: special.2010.06.28

Mother's milk is all Tiggy has eaten since he was born six weeks ago.

VOA: special.2010.08.04

The sign has its beginnings five thousand years ago in Egypt.

VOA: special.2009.03.22

Kadagi says her organization has released more than 5,000 turtles back into the ocean since the group started 10 years ago.

VOA: standard.2010.07.15

The case has generated concern among India's security establishment, still reeling from the large terror attack on Mumbai 11 months ago.

VOA: standard.2009.10.30

Jordaan has been responding to such concerns since South Africa was awarded the rights to host the Cup five years ago.

VOA: standard.2009.06.12

started her acting career more than 10 years ago, and has appeared in a mumber of TV shows.

VOA: standard.2010.07.22

The South West Africa People's Organization, which has dominated Namibian politics since independence nearly 20 years ago, is expected to retain power.

VOA: standard.2009.11.28

Since leaving office a year ago, Dick Cheney has been one of President Barack Obama's strongest critics.

VOA: standard.2010.02.14

The government has cracked down very severely since the violence there some months ago against religious leaders and others of the Muslim faith."

VOA: standard.2009.10.26

His South West Africa People's Organization, which has governed Namibia since independence nearly 20 years ago,is expected to win a two-thirds majority in parliament.

VOA: standard.2009.11.27

has strongly called for disarmament and he has worked to restart the stalled Middle East peace process since taking office nearly 10 months ago.

VOA: standard.2009.10.09