Quote:
Originally Posted by rock
...upcoming Stephen Hawking show...
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http://www.timesonline.co.uk/tol/new...cle7107207.ece
I find it hard to imagine there being many raw materials on Earth that wouldn't be quicker, easier, and cheaper to harvest from comets, asteroids, and plutinoestimals (or whatever they are called this week) than down the gravity well of a planet.