Has water been spotted on Mars?

Last updated at 05:44

Nasa scientists think they may have found signs of flowing water on Mars.

Pictures beamed back from the red planet show dark stripes on its surface, which come and go as seasons change.

Researchers reckon the lines are caused by salty water, made by melting ice.

It's got lots of people excited, because if it's true, it means there could be signs of life on the planet too.

That's because water is essential for any life form.

But Nasa experts still need to find out more - at the moment they're still not sure if what they've seen is actually water flowing.

If it's confirmed, it would be the first discovery of liquid water in the ground on Mars.