Right now, Mars is a frozen, lifeless, and entirely inhospitable place.
Yet the Red Planet holds great promise, and SpaceX CEO Elon Musk recently discussed its future with comedian and television host Stephen Colbert.
Musk, who hopes to build a colony of 1 million people on Mars, told Colbert that there are two ways to warm the global temperatures on Mars, which would help transform it from a barren wasteland into a hospitable, Earth-like planet.