Because the canyon's environments are so different, these species did not spread beyond the canyon, or even far within it.

VOA: special.2009.10.07

It said Congress had no right to help spread slavery by permitting it in the new western territories.

VOA: special.2009.03.12

It found that their lack of complex products like futures and derivatives limits the ability to spread risk.

VOA: special.2009.12.11

It serves as a landing area for bees and other insects that spread pollen to the plant.

VOA: special.2010.04.06

It is important to know early warning signs so that cancerous growths are found before they spread.

VOA: special.2010.07.06

It says one dose of the medicine given to mother and child prevents the spread of H.I.V.

VOA: special.2010.05.24

They felt it was God's will, and their duty,to spread American democracy and freedom across the continent.

VOA: special.2009.02.19

Since then it has spread to neighboring countries including Kenya,Rwanda,Tanzania and the Democratic Republic of Congo.

VOA: special.2009.09.21

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

VOA: special.2009.09.22

With hand tools, he and Rufus Robinson threw dirt on the fire and dug a line to contain it so the flames would not spread.

VOA: special.2009.11.24

Martian methane is also unusual because it is not evenly spread over the planet.

VOA: special.2009.12.30

They said it was part of a southern plan to spread slavery wherever possible.

VOA: special.2009.04.23

And so,the information - secret as it is C begins to spread.

VOA: special.2009.02.22

It is spread to humans through the bite of infected tsetse flies.

VOA: special.2010.01.04