For such a civilization to be truly self-sustaining, it would need to produce its own resources, food, energy, technology, and infrastructure.
Musk has argued that a Mars settlement would not truly protect humanity if it depended permanently on supplies from Earth.
If communication or transportation between Earth and Mars were interrupted, a self-sustaining settlement would need to continue functioning on its own.
SpaceX and the Future of Mars
SpaceX, Musk’s space company, has made human missions to Mars one of its major long-term ambitions.
The company is developing Starship, a large reusable spacecraft designed to transport people and cargo into space.
The long-term vision involves using large spacecraft to transport significant numbers of people and supplies to Mars.
However, establishing a permanent human civilization on Mars remains an enormous technological challenge.
Humans would need to deal with radiation, extreme temperatures, limited resources, low atmospheric pressure, and the absence of a naturally breathable atmosphere.
Is Earth Really Going to Be Destroyed Soon?
No.
The timescales involved are so enormous that there is no reason for people today to interpret this as an immediate threat.
The estimated decline in Earth’s habitability occurs on a timescale of roughly one billion years, while the Sun’s red giant phase is expected in roughly five billion years.
