Although there is not a fixed date for such an expedition, scientists expect to live in Mars during the next decades.
One of the biggest problems to solve is related to the resistance of the human body to live in the space. Nowadays, astronauts can only spend a limited time at space stations, since a long exposure to spatial conditions can involve serious health problems.
There is still so much work to do so that people can safely travel to Mars, but NASA assures that it will be worth the wait: "With humans on Mars, we will be able to advance science and technology in ways only dreamed of with current robotic explorers."
What do you think about this? Would you be able to live in another planet?