Can humans colonize other celestial bodies?
Some scientists believe that humanity will survive most of the challenges that nature will bring. Over the next thousand years, we may have to deflect a giant asteroid or clear the atmosphere of sulfur from a giant volcano. We will endure solar flares and maybe even some supernova radiation. When humans finally colonize Mars – in 300 years or so – we’ll ride out year-long Martian sandstorms. When humans colonize Jupiter’s moon Europa, we’ll endure 8.0 magnitude ice quakes. And, when humans colonize Saturn’s moon Titan, we’ll deal with floods of liquid methane. But someday, humanity will need to flee the solar system entirely. One thing we know for sure is that there is a finite amount of energy in our solar system. Even the energy in the Sun is finite. When this energy begins to run out, everyone is going to have to pack up and move out. Otherwise, starved of energy, civilization will collapse, and consequently, most everyone will die. Some people say that humanity will always find more sources of energy. That might be true, but someday we’ll need to go outside of our solar system to get it.
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