Are the laws of physics fine-tuned to support life?
Many scientists hate this idea--what's often called "the anthropic principle." They suspect it's a trick to argue for a designer God. But more and more physicists point to various laws of nature that have to be calibrated just right for stars and planets to form and for life to appear.
For instance, if gravity were just slightly stronger, the universe would have collapsed long before life evolved. But if gravity were a tiny bit weaker, no galaxies or stars could have formed. If the strong nuclear force had been slightly different, red giant stars would never produce the fusion needed to form heavier atoms like carbon, and the universe would be a vast, lifeless desert.
British-born cosmologist Paul Davies calls this cosmic fine-tuning the "Goldilocks Enigma." Like the porridge for the three bears, he says the universe is "just right" for life. Davies is an eminent physicist who's received numerous awards. His 1992 book, The Mind of God, has become a classic of popular science writing. But his new book, The Cosmic Jackpot, will challenge even the most open-minded readers. Without ever invoking God, Davies argues for a grand cosmic plan. The universe, he believes, is filled with meaning and purpose.
What Davies proposes is truly mind-bending. Drawing on the bizarre principles of quantum mechanics, he suggests that human beings--through the sheer act of observation--may have helped shape the laws of physics billions of years ago. What's more, he says the universe seems to work like a giant computer. Indeed, it's possible that's exactly what it is, and we might just be living in a simulated virtual world.
Source: "We are Meant to Be Here" by Steve Paulson, www.salon.com July 3, 2007






