The mummification process protects the body's soft tissue long after it would normally break down.

VOA: special.2010.06.29

The researchers tested all the children for products that break down from organophosphates.

VOA: special.2010.05.26

Physically,the rocks break down into smaller and smaller pieces.

VOA: special.2009.09.14

"They fall all over the Earth, not just Antarctica, but the best places for us to find them are the deserts because they don't get weathered and they don't break down as easily."

VOA: special.2010.07.28

Researchers say the speech impediment appears to stem from a defectin the gene that regulates the way brain cells break down and recycle waste products.

VOA: standard.2010.02.11

He says the war-time unit helped break down racial barriers in the United States.

VOA: standard.2009.12.30

Wowereit added that the project is meant to teach them about that time in history and to encourage them to break down walls and barriers wherever they may be.

VOA: standard.2009.11.09

"We know that surface use of dispersants decreases the environmental risk to shorelines and organisms at the surface and we know that dispersants break down over weeks rather than remaining for several years as untreated oil might."

VOA: standard.2010.05.18