University of California biologist Bill Schopf studies ancient fossils and the dirt they are found in on earth.

VOA: special.2010.05.25

Archeologists are able to estimate the age of these objects by dividing layers of dirt into time periods.

VOA: special.2009.08.18

When they have removed all the dirt, they are down to the brass tacks, the copper pieces that hold the boat together.

VOA: special.2010.05.16

Slowly,they moved the water around in the pan until most of the dirt and water washed away.

VOA: special.2009.02.04

It is said that he traveled the eighty kilometers to Mexico City to meet with reporters and arrived with dirt on his hands.

VOA: special.2009.11.10

They placed dirt and rocks in a pan and then filled it about half way with water.

VOA: special.2009.02.04

Remove dirt from the wound and press on it with a clean cloth or piece of clothing.

VOA: special.2009.08.11

But in time, huge machines were built that could wash many tons of dirt at a time.

VOA: special.2010.04.25

"I'm at home,digging in the dirt, or doing something that is very close to the Earth, because that's where I know how to survive."

VOA: special.2009.06.07

By the middle of the eighteen-hundreds, dirt roads had been built in parts of the nation.

VOA: special.2010.01.11

The rivers carried dirt and pieces of stone that slowly ate away at the surrounding rock.

VOA: special.2009.10.07

The present Taos Pueblo buildings are made of adobe, a mixture of wet dirt and straw.

VOA: special.2010.07.05

The process uses a closed system to keep hair and dirt out of the milk.

VOA: special.2010.07.20

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

So it is normal for a burro to have some dirt in its coat.

VOA: special.2010.02.16

Wash the cans with soap and water, and brush or wipe away dirt.

VOA: special.2010.07.19

On the dirt roads near our house I learned to drive a car.

VOA: special.2010.01.30

First,remove any labels. The paper may contain dirt and germs from the floodwater.

VOA: special.2010.07.19

In addition to explosives, the techniques involved large amounts of water and dirt.

VOA: special.2009.03.22

First a gold miner put dirt in a metal pan and added water.

VOA: special.2010.04.25

Then he shook the pan so that the water would wash the dirt.

VOA: special.2010.04.25

These early homes were made of a mixture of wet dirt,wood and rocks.

VOA: special.2010.07.05

Dirt may be harder to remove from some crops than from others.

VOA: special.2009.06.09

The roads are still made of dirt. Driving requires a special vehicle.

VOA: special.2009.04.15

Heavy spring rains had turned the dirt roads into rivers of mud.

VOA: special.2009.09.17

It traps dirt and other matter and keeps insects out.

VOA: special.2010.03.31