Elon Musk said we'd reach Mars in 2026. Now, he says SpaceX is building a city on the moon. (www.businessinsider.com)

Elon Musk has announced a significant shift in SpaceX's priorities, moving away from plans to reach Mars by 2026 and instead focusing on developing a "self-growing city" on the moon. This change comes as Musk emphasizes the more frequent launch opportunities available to the moon, allowing for quicker iterations and deployment of technology compared to the lengthy travel and alignment required for Mars missions. Musk highlighted that moon missions can occur every 10 days, with a two-day travel time, versus the six-month journey to Mars, making lunar development a more immediate goal. In a related move, SpaceX recently acquired Musk's AI venture, xAI, which aims to create a robust integration of AI, rocket technology, and communications systems. This acquisition is intended to serve as a "vertically-integrated innovation engine" that could enhance capabilities on both Earth and in space. Despite pivoting to lunar ambitions, Musk reassured that Mars remains part of SpaceX's long-term vision, with plans for Martian cities to commence in five to seven years. This announcement underscores not only the evolving landscape of space exploration but also the increasing role of AI in advancing these ambitious goals.