Mister Boas believed that the environment people grow up in -- not family genes caused most cultural differences among people.

VOA: special.2010.01.17

She says this monument is a quiet place for people to come to terms with loss caused by the war.

VOA: special.2009.05.06

The navigator also had to add any movement of the ship to the side caused by waves or the wind.

VOA: special.2009.12.23

He said the darkening of the Martian surface during some times of the year was caused by the growth of plants.

VOA: special.2010.07.11

The second group did not. But some medical researchers refused to accept that a poor diet caused pellagra.

VOA: special.2010.05.18

It caused strange thoughts. He said the cold and silence of this frozen world seemed to increase a man's fear of death.

VOA: special.2009.02.11

She wore the huge jewel even though she had received warnings that it caused terrible things to happen.

VOA: special.2009.09.21

About eighty percents of illnesses spread by food are still listed as having been caused by "unspecified agents."

VOA: special.2011.01.11

Mister Hawass says that scientists have not yet been able to tell what caused the brown spots.

VOA: special.2009.12.15

Others die from being out in the cold or from heart attacks caused by extreme physical activity.

VOA: special.2010.01.05

Dangerous mountain paths. And they all risk developing a serious health disorder caused by lack of oxygen.

VOA: special.2010.06.30

Murlock had risen to his feet. Extreme fear had caused him to lose control of his senses.

VOA: special.2009.10.31

He said he is upset by the many changes he sees caused by rising temperatures on Everest.

VOA: special.2010.06.30

Tests showed that instead of killing the bacteria, the bleach actually caused the bacteria levels to increase.

VOA: special.2009.10.13