Phase five is marked by human-to-human spread of the virus into at least two countries in the same area of the world.

VOA: special.2009.05.06

African lions are also threatened by human expansion into areas that once were wild lion country.

VOA: special.2009.05.05

But cement manufacturing produces around five percent of the carbon dioxide released by human activity worldwide.

VOA: special.2009.12.01

Mister Peers had researched stories of spider silk being used by human weavers.

VOA: special.2009.10.30

Most scientists believe the warming trend is mainly caused by human activity, especially the use of fossil fuels and the cutting down of forests.

VOA: standard.2009.12.09

The U.S.and Kenyan governments were harshly criticized by human rights groups for the illegal detentions of at least 150 people in 2006-2007 as terrorist suspects.

VOA: standard.2009.05.01

Scientists say an experimental vaccine reduced the risk of infection in human beings by thirty-one percent and was safe.

VOA: special.2009.10.13

In the early days of human history, people survived by hunting wild animals, or gathering wild grains and plants for food.

VOA: special.2010.01.31

The researchers also found tools used by the Clovis culture, a group of human beings who lived at that time.

VOA: special.2009.01.20

Friday, the top U.N. human rights official called for an independent investigation into possible war crimes by both sides in the conflict.

VOA: special.2009.01.10

By the end of the nineteenth century, he was developing some exciting new ideas about the human mind.

VOA: special.2010.04.13

Human DNA carries the information that decides our heredity, the characteristics passed on to us by our ancestors.

VOA: special.2010.03.23

That was the finding of a study by the Human Smuggling and Trafficking Center, established by Congress.

VOA: special.2010.06.14

Most human infections with Rift Valley fever are caused by direct or indirect contact with diseased animals.

VOA: special.2010.07.12