The main problem is that most of the exoplanets we have found aren't very hospitable to human life.

And even the ones that MAY (emphasis on the may) be able to support life usually have a higher gravity then earth.

So even if we could travel to other planets, most of them don't fit into the mold that would allow us to survive, let alone live there.

Humans are simply to fragile to exist on most other worlds outside this one.

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