His mother's increasing deafness led the young man to study acoustics -- the way we hear and how sounds are made.

VOA: special.2010.05.14

He claimed that living in Illinois and Wisconsin -- where slavery was illegal -- had made him a free man.

VOA: special.2009.05.14

The FDA also has approved a man-made form of myelin basic protein to treat this kind of MS.

VOA: special.2009.01.06

Clouds with extremely cool water are mixed with man-made ice crystals, such as silver iodide and metaldehyde crystals.

VOA: special.2011.01.11

She also got some of the first chemical measurements that showed man-made chlorofluorocarbons caused the hole.

VOA: special.2009.03.13

That poem is about our first man-made wonder -- the Brooklyn Bridge in New York City.

VOA: special.2009.03.04

Arm amputees commonly use devices joined to their shoulders to operate man-made arms or wrists.

VOA: special.2009.03.10

They did, honestly! His smallest mistakes made a man in his right mind cry - and shout and scream, too - to himself, of course.

VOA: special.2009.01.03

In nineteen thirty-six, a physicist from Japan produced the first man-made snow in a laboratory.

VOA: special.2010.01.05

The noise of its rockets was one of the loudest man-made sounds ever created.

VOA: special.2009.07.08

and so -- very slowly -- I made up my mind to take the life of the old man, and free myself of the eye forever.

VOA: special.2009.05.16

In Theodore Maiman's first laser, a rod of man-made ruby supplied the electrons.

VOA: special.2010.09.01

Alan Shepard made only a fifteen-minute flight in the little one-man Mercury spacecraft.

VOA: special.2009.07.08

The number of man-made objects in Earth orbit has been growing each year.

VOA: special.2009.04.01

Hoover Dam also created Lake Mead, the largest man-made lake in America.

VOA: special.2009.03.04

A critic once described American writer Edith Wharton as a "self-made man."

VOA: special.2010.10.24

Boats also traveled along man-made canals which strengthened local economies.

VOA: special.2010.01.11

Today,we take you to seven man-made wonders in America.

VOA: special.2009.03.04

Now we have done it to space as well and created our own problem because all this stuff is man-made."

VOA: standard.2010.07.24

Dubai World's debts grew from projects initiated during Dubai's property boom, including man-made islands in the shape of palm trees and the world's tallest building.

VOA: standard.2009.12.02

A middle-aged man who works at the market complained that it made no sense to him why anyone would put a bomb in a crowded vegetable market: He said that all the traders and sellers were going about their business when the explosion took place.

VOA: standard.2009.06.01