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[–] Goater ago 

Yeah, but read the writers bio. Classic bio of a hack writer for hire.

Also, when you make statements like this:

Even if Earth were to suffer the catastrophes that Hawking worries about -- and they all worry me, too -- it would still be more habitable than the moon or Mars.

It demonstrates a complete lack of knowledge of how many cosmic events can end life on earth and that they are primarily black swan events, we cannot predict them, the only logical option is to start as soon as possible.

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[–] MichaelCaine [S] ago 

So the writer picked one to focus on? He wasn't writing a compendium of disasters.

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[–] Goater ago 

Yes, but the need for colonization remains the same regardless of the source of disaster.

face of catastrophes like climate change, asteroid strikes, epidemics and overpopulation.

The author named a few, not just one, do you believe he presented a compelling argument that humans should not expand en masse into the solar system to ensure survival?