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But in the long term the planet will end for life when the sun gradually ages, warms and expands. Humans are the only species that has lived on it that has the capability in the future to move somewhere else when it has too, if we are still here.

Yes. But we have been the only species that have done anything significant in the long history of life on the planet. In a short period of time 200 thousand years modern humans have completely changed the planet, walked on the moon and sent space craft throughout the solar system. Who knows what...