"It has so much capability, so much more capability than any other vehicle, that I think we can start to contemplate missions like a Mars sample return, which requires a tremendous amount of lift capability because you've got to send a lander to Mars that still has enough propellant to return to Earth."

VOA: special.2011.04.11

And Mars has this sort of human, flabby torso that's not-- it's sympathetic, but it's a different portrayal of war.

马尔斯看起来像一个普通人,略微虚胖,这一点让人同情,但这是对战争的不同描写

耶鲁公开课 - 欧洲文明课程节选

But Howard-Yana Shapiro, head of plant science and external research at Mars, thinks that science could greatly increase the yield.

VOA: special.2010.10.19

Volcanoes on Mars suggest to Sam that the same kinds of processes that take place on Earth happen on other worlds.

VOA: special.2010.07.28

Marc Rayman says Vesta appears to have a layered structure, one that is similar to planets like Earth, Mars and Venus.

VOA: special.2011.07.27

Percival Lowell did not know that his eyes played a part in the markings he saw on Mars.

VOA: special.2010.07.11

Not having anything that they're striving for. Not going back to the moon or trying to go to Mars, or anything else."

VOA: special.2010.04.28

They could see a test version of the Viking landers that reached Mars in July of nineteen seventy-six.

VOA: special.2010.07.28

Another robot is designed to move and turn in a way that is similar to the Mars rovers.

VOA: special.2010.07.28

Mars landers and rovers were designed to look for signs of liquid water that may have flowed on Mars in the distant past.

VOA: special.2010.07.28

For example, Donna Lee Shirley led the team that built the vehicle to explore the planet Mars.

VOA: special.2009.05.13

And what does that mean? It means I am trained in geology, but with interests in the other planets and Mars in particular."

VOA: special.2010.07.28

In January,a team of NASA and university scientists announced that they had found methane gas on Mars.

VOA: special.2009.12.30

In it,he developed a theory that intelligent life had created waterways all over the surface of Mars.

VOA: special.2010.07.11

Mars Day offered Allison and Alysia's children a chance to learn more about a world that humans may set foot on within their lifetimes.

VOA: special.2010.07.28

This shows that the robots developed for Mars have won over a new generation of explorers.

VOA: special.2010.07.28

Not once did I question this fact. My mind told me I was on Mars as your mind tells you that you are upon Earth.

VOA: special.2010.07.10

This raises the exciting possibility that life may have existed in the past on Mars.

VOA: special.2009.12.30

Eight-year-old Sam learned that the ancient description of Mars as red is not exactly right.

VOA: special.2010.07.28

In nineteen sixty-five, NASA's Mariner Four spacecraft showed that no waterways existed on Mars.

VOA: special.2010.07.11

She found out about the volcanic activity that has shaped the surface of Mars.

VOA: special.2010.07.28

I once landed on my face. I soon learned that it took much less effort for me to move on Mars than it did on Earth.

VOA: special.2010.07.10

It is the first book in a series that Mister Burroughs wrote about a man who travels to Mars during the last years of the eighteen hundreds.

VOA: special.2010.07.10

He quickly learns that gravity on Mars is much less than on Earth.

VOA: special.2010.07.17

It also is probably what a number of reporters said earlier this month when they were permitted to see a machine that will be sent to the planet Mars.

VOA: special.2011.04.26

"That the closest thing to Mars-the stuff-is from volcanoes mostly."

VOA: special.2010.07.28

But it formed on Mars long before that.

VOA: special.2010.07.28

"It surprises me from the way I felt at the time that we haven't been to Mars."

VOA: standard.2010.04.15