For more than a century, popular culture has promised that humanity will spread effortlessly across the Solar System, turning Mars into a second Earth and building floating cities above Venus. The ...

Whether its pioneering spirit and an urge to explore or a chance to make a fortune or new life out in space, colonization of our solar system may pursue many strategies across many new worlds.

Elon Musk's dream of colonizing Mars is taking a backseat as SpaceX shifts its focus to building a self-sustaining city on the moon within a decade.