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In its first year on the red planet, the six-wheeled rover has driven a little bit more than a mile, drilled into rocks and performed chemical and mineral analysis. Its next journey is a 5-mile trek to the foothills of Mount Sharp to help study Mars' watery past.

"Dear NASA," the letter begins. "My name is Dexter I heard that you are sending 2 people to Mars and I would like to come but I'm 7."

The dose of radiation an astronaut would experience on a trip to Mars is higher than the annual limit set for workers at nuclear power plants. But Mars enthusiasts say the radiation threat isn't high enough to cancel the trip.

Scientists have discovered water that was sealed in Canadian bedrock for nearly half of Earth's history. It may contain the descendants of ancient microbes. The discovery could give scientists new insights into early life on Earth and inform the search for life on other planets.

NASA is looking for three haiku to include on a DVD that will travel to Mars aboard a spacecraft this fall. And everyone who submits a poem will have their name included.

The company Mars One has launched a program that could allow you (yes you!) to make a trip to Mars. But you can't come back.

Communications between the Earth and Mars are going on a month-long hiatus, thanks to interference from the sun. That means NASA's spacecraft on Mars will be on their own until NASA's radio signals can reach them again.

Drilling into some Mars rock, the rover found sulfur, nitrogen, hydrogen, oxygen, phosphorus and carbon — key ingredients for life.

mission planners are looking for an older couple who could survive the very challenging — and incredibly cramped — conditions of the year-and-a-half-long trip.

What looked like a piece of metal protruding from a piece of rock had tongues wagging. It turns out, it's a piece of shiny rock — a lot like some we see here on Earth.