Depending on whom you talk to, terraforming could take anywhere from ... The lack of gravity may cause humans on Mars to evolve differently than on Earth. Mars has one-third the gravity of Earth ...

With NASA hoping to send humans to Mars in the 2030s and Elon Musk touting SpaceX's sci-fi-level plans for colonizing the Red ...

Mars is fairly attractive as ... the planet as a starting point for further terraforming works. His plan involves no nuclear reactors, chemical seeding, or big mining operations.

Mars may be the most Earth-like of the other planets in our Solar System, but it's still an inhospitably cold desert world with a thin and unbreathable atmosphere. If humans are ever going to ...