SpaceX billionaire Elon Musk may have his heart set on building a city on Mars, but Amazon billionaire Jeff Bezos’ space vision looks closer to home. He’s gazing at the moon.

“I think we should build a permanent human settlement on one of the poles of the moon,” Bezos said today during a Q&A with kids at Seattle’s Museum of Flight. “It’s time to go back to the moon, but this time to stay.”

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