Very roughly, this involves replacing elementary particles with objects more like loops, and it crucially requires six extra dimensions beyond the three space and one time dimension we're familiar with. For more than 20 years now, theoretical physics has been dominated by a very speculative idea known as 'string theory'.
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This explanation suffers from the lack of any way to ever test it.ĭavies spends much of the first half of the book providing an introduction to the modern scientific view of physical laws and cosmology, working up to the latest and trendiest of these.
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'Intelligent Design' is the currently popular name for explanations of physics or biology that invoke a higher intelligence that chose to make the world the way it is. What should one make of this? Religion has a quick explanation, that God set things up so that we can exist. Relatively small changes in certain parameters would make it uninhabitable by the likes of us and we wouldn't be here. This refers to the fact that the physical laws that govern the universe are 'just right' for the development of life.
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Paul Davies's new book The Goldilocks Enigma wrestles with some of the deepest philosophical issues around, but concentrates on one in particular: 'why is the world the way it is?'He approaches this question through a discussion of a hot topic in theoretical physics that most scientists refer to as the 'Anthropic Principle', but which Davies chooses to label the 'Goldilocks Enigma'.