Can humanity transform the barren Mars into a "second Earth" suitable for large-scale habitation within 100 years? What form will future Martian cities take?

While humans living on Mars is the stuff of sci-fi movies for now, scientists may have figured out a major step toward colonization, by in effect creating global warming on the planet. It could be ...

Terraforming an entire planet is a colossal undertaking that will take lifetimes to complete. So assuming you're that committed to seeing it through, how do you even start? Labor wins Australia ...