In his first observations from Mount Wilson, Hubble used a telescope with a mirror one hundred fifty-two centimeters across.

VOA: special.2009.04.29

The researchers used a national long-term survey of adolescent health to investigate the relationship between media use and depression.

VOA: special.2009.02.11

American researchers used a national long-term survey of adolescent health to investigate the link between media use and depression.

VOA: special.2009.03.10

Farm workers and others who said they often used pesticides had a forty-one percent greater risk of Parkinson's than other people.

VOA: special.2009.04.07

Old-timers used it to describe a man who had just arrived from one of the big cities back east.

VOA: special.2010.05.23

And robotic submarines are being used to try to stop the leak -- a process that could take weeks.

VOA: special.2010.05.01

The gel contains tenofovir. This is a common anti-retroviral drug used to treat people with HIV, the virus that causes AIDS.

VOA: special.2010.07.21

In the e-mail, he used the words "trick" and "hide the decline" when writing about a graph showing rising temperatures.

VOA: special.2010.01.19

He says the group used a million-and-a-half-dollar donation from the Nike Foundation to expand the program to cricket players in India.

VOA: special.2010.07.15

As a result, they used the frogs in fast-acting, low-cost pregnancy tests for women during the nineteen-forties and fifties.

VOA: special.2010.06.29

This year there are some two-hour plays. There used to be just an hour play and a lot of monologues."

VOA: special.2009.08.05

They also used a new,lithium-ion battery that is expected to last longer than batteries in current hybrid cars.

VOA: special.2010.11.17

In seventeen ninety-seven, the Independent Chronicle newspaper used the word to describe a politician the paper supported.

VOA: special.2010.08.08

Intelligence officials said the head of al-Qaida's operations in Afghanistan used a middleman to communicate with him.

VOA: special.2009.10.17