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

The atmosphere is about twenty-percent oxygen and eighty percent nitrogen from Earth's surface to where space begins at one-hundred-twenty kilometers up.

VOA: special.2011.04.06

But at one time, some businesses refused to employ people who were on a blacklist for belonging to unpopular organizations.

VOA: special.2009.11.15

But the anger was directed mainly at one hundred sixty-five million dollars in bonuses paid to employees of A.I.G.

VOA: special.2009.03.20

The study found there is strong support for restricting work by doctors-in-training to sixteen or fewer hours at one time.

VOA: special.2010.07.13

The winners in each area of science will share a prize valued at one million four hundred thousand dollars.

VOA: special.2009.12.08

British Prime Minister Winston Churchill. "Hostilities will end officially at one minute after midnight tonight,Tuesday, the eighth of May.

VOA: special.2011.06.16

At one point in the competition the team members had been opponents, but they joined forces to increase their chances of winning.

VOA: special.2009.09.25

At one extreme were the supporters of former President Van Buren -- New York Democrats opposed to slavery.

VOA: special.2009.03.05

He was ninety-four years old. Someone once asked him if he thought he would still be playing at one hundred years old.

VOA: special.2009.09.27

At one concert in the southern state of Mississippi, Anderson saw that her singing could bring people together.

VOA: special.2009.01.25

They are the amount a person drinks on average and heavy drinking at one time, called "binge drinking."

VOA: special.2009.09.08

"I think we may be looking at one of those almost generational changes in the role of the federal government in US society."

VOA: special.2011.07.15

At one point he came so close to running out of gas he considered using his parachute.

VOA: special.2011.04.27