Elon Musk's SpaceX just overhauled its to-do list. In an X post on Sunday, the CEO said that the company is shifting its focus from Mars to creating a "self-growing city" on the moon. "It is only possible to travel to Mars when the planets align every 26 months (six month trip time), whereas we can launch to the Moon every 10 days (2 day trip time)," Musk wrote. "This means we can iterate much faster to complete a Moon city than a Mars city." The announcement is a big departure from Musk's