'Suitcase' Nuclear Reactors to Power Mars Colonies : Discovery News Nuclear power is an emotive subject -- particularly in the wake of the Fukushima power plant disaster after Japan's March earthquake and tsunami -- but in space, it may be an essential component of spreading mankind beyond terrestrial shores.
Small nuclear reactors about the size of a carry-on suitcase could power human civilization on Mars. Given that the habitats will need to have constant power just to keep their inhabitants alive, nuclear power on Mars could make the difference between lethal failure and shining success of human colonies there.
There are also links to other great articles.