Understanding the universe - Order of creation
Even Stephen Hawking doesn't quite manage to explain why we are here
Sep 9th 2010
Here comes the sun
The Grand Design. By Stephen Hawking and Leonard Mlodinow. Bantam; 198 pages; $28 and £18.99. Buy from Amazon.com, Amazon.co.uk
IN 1988, Stephen Hawking, a British cosmologist, ended his best-selling book, “A Brief History of Time”, on a cliff hanger. If we find a physical theory that explains everything, he wrote—suggesting that this happy day was not too far off—“then we would know the mind of God.” But the professor didn’t mean it literally. God played no part in the book, which was renowned for being bought by everyone and understood by few. Twenty-two years later, Professor Hawking tells a similar story, joined this time by Leonard Mlodinow, a physicist and writer at the California Institute of Technology.
In their “The Grand Design”, the authors discuss “M-theory”, a composite of various versions of cosmological “string” theory that was developed in the mid-1990s, and announce that, if it is confirmed by observation, “we will have found the grand design.” Yet this is another tease. Despite much talk of the universe appearing to be “fine-tuned” for human existence, the authors do not in fact think that it was in any sense designed. And once more we are told that we are on the brink of understanding everything.
The authors may be in this enviable state of enlightenment, but most readers will not have a clue what they are on about. Some physics fans will enjoy “The Grand Design” nonetheless. The problem is not that the book is technically rigorous—like “A Brief History of Time”, it has no formulae—but because whenever the going threatens to get tough, the authors retreat into hand-waving, and move briskly on to the next awe-inspiring notion. Anyone who can follow their closing paragraphs on the relation between negative gravitational energy and the creation of the universe probably knows it all already. This is physics by sound-bite.
There are some useful colour diagrams and photographs, and the prose is jaunty. The book is peppered with quips, presumably to remind the reader that he is not studying for an exam but is supposed to be having fun. These attempted jokes usually fuse the weighty with the quotidian, in the manner of Woody Allen, only without the laughs. (“While perhaps offering great tanning opportunities, any solar system with multiple suns would probably never allow life to develop.”) There is a potted history of physics, which is adequate as far as it goes, though given what the authors have to say about Aristotle, one can only hope that they are more reliable about what happened billions of years ago at the birth of the universe than they are about what happened in Greece in the fourth century BC. Their account appears to be based on unreliable popularisations, and they cannot even get right the number of elements in Aristotle’s universe (it is five, not four).
The authors rather fancy themselves as philosophers, though they would presumably balk at the description, since they confidently assert on their first page that “philosophy is dead.” It is, allegedly, now the exclusive right of scientists to answer the three fundamental why-questions with which the authors purport to deal in their book. Why is there something rather than nothing? Why do we exist? And why this particular set of laws and not some other?
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Read more here/Leia mais aqui: The Economist
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