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

She fell back to Earth, but the steel-spring bustle just bounced her back up as high as before.

VOA: special.2009.11.28

A robot would then pick up rocks and soil, and send them back to earth for testing.

VOA: special.2010.05.25

He said the Earth is hiring and it was up to them to join together and do what is needed to help save the planet.

VOA: special.2009.06.05

He not only showed humanity how to get more food from the Earth, he proved that farming has the power to lift up the lives of the poor."

VOA: special.2009.11.10

This speeded up the spacecraft to reach Earth nine hours sooner.

VOA: special.2009.07.22

A strange odor came up to me from the earth.

VOA: special.2009.11.15

"What we are doing,folks, we are rolling up our sleeves and we are getting down to business and getting back to the common sense conservative principles that made this country the greatest country on earth, and we are not going to sit down and shut up."

VOA: standard.2010.03.28