By: Julian Savulescu
Stephen Hawking, the Cambridge physicist, has recently argued, in a Discovery channel documentary, that alien life forms probably exist somewhere in the Universe, but we should avoid contact with them. (http://news.bbc.co.uk/1/hi/uk/8642558.stm). His reason is, apparently, that if they are anything like humans, they are likely to be aggressive and either exterminate us or pillage our resources.
"If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans," he said. "We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet."
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