Elon Musk wants to colonize Mars. In fact, the billionaire says it could happen within four years. He also says we could be living in a self-sustaining city on the red planet in the next 20 years.

Intuitive Machine Inc. LUNR recently announced that its IM-2 mission Nova-C class lunar lander, Athena, has achieved all integration milestones and is now ready for launch after being securely ...