It's a speculation, not an assertion. But it's a speculation many well-informed scientists have made in the last few years. For example: http://blogs.wsj.com/i

It's a speculation, not an assertion. But it's a speculation many well-informed scientists have made in the last few years. For example: http://blogs.wsj.com/ideas-market/2011/02/07/the-difficulty-of-making-new-discoveries/ http://blogs.wsj.com/ideas-market/2011/02/07/the-difficulty-...