Reply to post: Re: A quote from Hawking

NASA: ALIENS and NEW EARTHS will be ours inside 20 years


Re: A quote from Hawking

"Resources on a planet can for the most part never actually be used up.... For instance we could mine out all the gold and take it in use, but unless we start shooting it out into space or radiate it with particles to turn it into lead we will never use it up.."

How about helium?

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