Naming expert Cleveland Evans explains that many of these names were traditionally female or male at one time or another.

VOA: special.2009.07.06

Professor Aicher explains that many composers have exciting premieres, where their music is played in public for the first time.

VOA: special.2010.07.12

The theory explains that as the sea floor spreads, the tectonic plates are pushed and pulled in different directions.

VOA: special.2011.01.04

She explains that some people in China may celebrate Valentine's Day, but China also has its own version.

VOA: special.2010.02.08

The University of Maryland Cooperative Extension explains that forest landowners can grow ginseng using two different methods.

VOA: special.2009.04.07

He explains that lead can enter the ground from leaded paint and leaded fuel and from industry.

VOA: special.2009.06.09

She explains that you can make a compost pile or dig a pit or use a waste container with holes cut in the side.

VOA: special.2009.06.23

She explains that health workers have been using what are called trivalent vaccines in some places.

VOA: special.2010.01.18

Rob Stewart explains that people fear sharks because of media stories and movies about shark attacks.

VOA: special.2009.04.03

Patent lawyer Meredith Martin Addy in Chicago explains that the court ruled narrowly.

VOA: special.2010.07.16

But Professor Jackson explains that soybeans have kept copies of most their genes.

VOA: special.2010.02.02

Sociologist Justyna Kopczynska from Warsaw University explains that young people in Poland realize that the communist government was repressive.

VOA: standard.2009.12.16

Qi Sun explains that the loss of the fiber-rich outer layer allows starch to be absorbed more quickly into the body.

VOA: standard.2010.06.25

Gomez explains that many Latino immigrant families see mental illness as a moral failure, a problem to be hidden.

VOA: standard.2010.07.22