The researchers compared the structures to the melanosomes that control the color of feathers on modern birds.

VOA: special.2010.03.16

A genome contains information about every position along chromosomes, the structures that hold genes.

VOA: special.2009.11.03

Others died or were injured from working in the structures called caissons.

VOA: special.2009.03.04

The structures, which included houses and mountain cabins, were mostly in isolated canyons.

VOA: standard.2009.09.01

"They don't quite trust the Israeli political system or the police or all the structures of authority and so a very tiny group has declared a war on the entire Israeli mainstream,".

VOA: standard.2009.11.14

In about the year seven hundred fifty, the early Pueblo people began building square structures of large connected rooms,or pueblos, above ground.

VOA: special.2011.03.30

Visitors to Zion National Park are surprised by the huge mountain structures of red, pink and white.

VOA: special.2009.04.15

They did not build permanent structures to live in because they followed the movement of the animals.

VOA: special.2010.07.05

Investigators blamed the destruction on the poor quality of many buildings and a lack of earthquake-resistant structures.

VOA: special.2011.01.04

Architecture is the art and scienceof designing and building structures such as houses,museums, and office buildings.

VOA: special.2009.12.13

Mister Hellsten says to look at parts of the genome of Xenopus tropicalis is to look at structures three hundred sixty million years old.

VOA: special.2010.06.29

In the United States, the force of a tornado is judged by the damage to structures.

VOA: special.2010.05.11

The trains pass by the Great Wall of China, an Egyptian pyramid,Paris' Eiffel Tower, the Taj Mahal in India -- thirteen structures in all.

VOA: special.2010.12.20

Both genes are necessary for the healthy development of the palate, teeth,skull and other facial structures.

VOA: special.2009.12.22