Have they actually found water flowing water above or below the surface of Mars? Suany John Dewey High School Brooklyn, NY

We have not yet found firm evidence for liquid water on the surface of Mars. Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory

	When I look at the pictures of Mars are there any patterns? Sarfraz Kilmer School Chicago, IL

There are a lot of things that are seen on Mars. John Callas Mars Exploration Rovers Science Manager Jet Propulsion Laboratory

	Does the weather change on Mars? Kaelin Pershing Elementary Chicago, IL

The weather is something we definitely have to take into account when we put these rovers together. Jessica Collisson Integration and Test Engineer Jet Propulsion Laboratory

	How fast does the rover go? Merita

The rover does not go very fast at all. Eddie Tunstel Flight System Engineer Jet Propulsion Laboratory

	If most of the hydrogen on Mars is in the form of water ice why is there so little oxygen in the atmosphere and on the surface? Gabriel Fort Collins, CO

On Mars most of the oxygen is tied up in the rocks and minerals. Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory

	What are airbags made of and can they withstand the landing surfaces? Desiree Alexander Graham Chicago, IL

Those airbags are very, very, very strong stuff. Rob Manning EDL Operations Manager Jet Propulsion Laboratory

	Why did you pick Mars to investigate and not another planet? Angelit Griffin Avenue Elementary Las Angeles, CA

We picked Mars because it's very close to the Earth in terms of its similarity and also nearness. Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory

	Will we ever send rovers to other planets? Margaret Maplebrook Elementary School Naperville, IL

Yes, we will send rovers to other planets. Adam Steltzner EDL Mechanical Systems Lead Jet Propulsion Laboratory

	What was the first rocket ever made? Was it successful? Diana Kellog Elementary School Chicago, IL

The first rocket history we have is actually back in the first century when the Chinese would actually fill bamboo shoots with explosive material similar to gun powder and launch them on arrows with bows. Jessica Collisson Integration and Test Engineer Jet Propulsion Laboratory

	What kind of surfaces are wheels on Mars rovers designed for? Chris Beckman Elementary Chicago, IL

The rovers can operate on sandy terrain, dusty terrain as well as very, very rocky terrain. Eddie Tunstel Flight System Engineer Jet Propulsion Laboratory

	I've heard that Mars will be closest to Earth this summer and I would like to know if that's the reason why the launches are set for May and June of this year. Ayadole John Dewey High School Brooklyn, NY

Yes approximately every twenty-six months the sun, Mars and Earth all form a line and Mars and the Earth are very close together. Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory

	How many parts are in a rocket and what is the most important part? Gina Kellog Elementary School Chicago, IL

To tell you the truth we haven't stopped counting yet. Wayne Lee EDL Chief Engineer Jet Propulsion Laboratory

	What would happen if we launch the rover and there is a dust storm on Mars? Priscilla Griffin Elementary Los Angeles, CA

If we launch the rovers and there was a dust storm on Mars chances are the dust storm would be over by the time we got there. Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory

	What triggers the opening of the airbag lander? Michael Alexander Graham Chicago, IL

The spacecraft as it approaches the surface of Mars is constantly measuring its height above the Martian terrain Adam Steltzner EDL Mechanical Systems Lead Jet Propulsion Laboratory

	What inspired you to be a NASA scientist or engineer? David Middle School Chicago, IL

I'm an engineer and what inspired me was when I was younger and looking out into the night sky and wondering what all those glits were about Jessica Collisson Integration and Test Engineer Jet Propulsion Laboratory

	Why do people want to be Mars scientists? Corley Pershing Elementary Chicago, IL

That's a very interesting question especially for me because I'm actually not a Mars scientist. John Callas Science Manager Jet Propulsion Laboratory

	Why is Mars red? Max Fort Collins, CO

My friend Justin Mackie did a careful study Joy Crisp Mars Exploration Rover Mission Project Scientist Jet Propulsion Laboratory