Mr. Irving is an investigative journalist who has covered aviation and aerospace for more than 30 years.

If Mars becomes a human colony is anyone’s guess. Musk said 2016 that it would take 40 to 100 years to have a self-sustaining civilization on the planet. While Mars is quite barren, dusty, and chilly, ...

Elon Musk believes a million people could be living in a self-sustaining city on Mars in just 20 years as he lays out his wild plan for colonizing the Red Planet ...