The next time you think about going without sleep, consider this: Laboratory animals that are kept awake for long periods of time ...die.

VOA: special.2009.08.26

Trains had special container cars with ice to keep meat, milk and other goods cold for long distances on their way to market.

VOA: special.2010.01.11

Mister Chavez often went for long periods without food to protest the conditions under which the farm workers were forced to do their jobs.

VOA: special.2009.09.06

John Henry grew up in a world that did not let children stay children for long.

VOA: special.2009.02.21

Often the mother had to be treated in a hospital for long periods of time.

VOA: special.2009.12.06

"By twenty twenty-five, we expect new spacecraft designed for long journeys to allow us to begin the first-ever crewed missions beyond the moon into deep space.

VOA: special.2011.07.18

For long hours he flew, listening only to the sound of his engine.

VOA: special.2009.03.18

And to prepare himself, he went without sleep for long periods of time.

VOA: special.2009.03.18

They believed him. And they began to dance for long hours every day.

VOA: special.2010.04.08

He says even if people have a healthy body weight, sitting for long periods of time still has an unhealthy influence on blood sugar and blood fats.

VOA: special.2010.01.13

Yarn is a general term for long pieces of interlocked fibers.

VOA: special.2009.11.04

Mary Cassatt did not stay with the Impressionists for long.

VOA: special.2009.07.12

But this record will probably not last for long.

VOA: special.2010.03.31

For long,his mind saw his past.

VOA: special.2010.02.27