Nasa has revealed its plans to try to get humans living on Mars in the next few decades.
The space agency has set out a three part plan, which it hopes will eventually lead to humans living on Mars by the 2030s.
Unlike the Moon, humans have never physically set foot on Mars, we've only ever used robots like the Curiosity Rover.
By exploring Mars with robots for the last 40 years Nasa has found out lots about our neighbouring planet, including the recent discovery that there is flowing icy water under the crust.
They hope that this huge mission will help us to learn even more about not just Mars, but Earth as well.
So, how will they do it?