Isn't this what would be called 'an irrelevant appeal to authority'? Dr. Hawking is an expert in the field of physics not earth science, so when all is said and done his opinion on this is just that, the opinion of a layperson. So I don't think there is a reason to panic (yet).
Besides according to the Bruce Willis documentary 'Armageddon' we will all be killed by an asteroid long before then, now there is a reason to colonize Mars.
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Isn't this what would be called 'an irrelevant appeal to authority'? Dr. Hawking is an expert in the field of physics not earth science, so when all is said and done his opinion on this is just that, the opinion of a layperson. So I don't think there is a reason to panic (yet).
Besides according to the Bruce Willis documentary 'Armageddon' we will all be killed by an asteroid long before then, now there is a reason to colonize Mars.