There are a number of reasons to create a human outpost on Titan instead of Mars.

For one, Mars is a very inhospitable lifeless place, 1% Earth's atmosphere, and few resources. Although it once had more water than the Arctic ocean, it's lost 87% into space. Going there would be like going to a freezing desert with no air.

On Titan however, there is an atmosphere, and hydrocarbons everywhere. Liquid Methane lakes could be used to fuel anything we bring or build there. It' the only place in the solar system, other than on Earth has lakes.

There may even be methane based life there.

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