INTERVIEW OF THE WEEK Marc Davis, Ph.D., Principle Investigator, Large Scale Structure of the Universe (former, Harvard-Smithsonian Center for Astrophysics); Astronomer, U.C. Berkeley.
DAVIS: The expansion rate was enormously high in the early universe. And the energy in the expansion had to be in perfect balance with the gravitational energy in the attraction. The, the kinetic and the potential energies were finely balanced to amazing precision, like, for example, one part in 10 to the 60, that is a one with 60 zeros. So that is a level of precision that is crazy.
DAVIS: So the universe, is [an] amazingly fine tuned environment, and
physicists are very keen to understand how it came to be this way. For this interview, Day Stars president, Fred Heeren, visited astronomer Marc Davis on the campus of U.C. Berkeley.
DAVIS: The fine-tuning is a remarkable statement. That the universe is on a knife-edge. It has been around for a long enough time to make us wonder how one could set up initial conditions to be so finely tuned....The expansion rate was enormously high in the early universe. And the, the energy in the expansion had to be in perfect balance with the gravitational energy in the attraction. The kinetic and the potential energies were finely balanced to amazing precision, like, for example, one part in 10 to the 60, that is a one with 60 zeros. So that is a level of precision that is crazy. HEEREN: Now you're talking about, if it had been faster or slower, the expansion rate, by that one part in 10 to the 60th power, what would have happened? DAVIS: The universe would be completely different. The universe todaythe universe would have either ended, many billions of years ago, or HEEREN: Because it would have collapsed back in on itself? DAVIS: It would have collapsed back in on itself. HEEREN: Yeah? DAVIS: Or instead the universe would be in free expansion today, and the balance between, uh, the mass of the universe vs. the critical values of the mass in the universe would be off by factors of, of billions. HEEREN: So on the one side, galaxies never could have formed, because they would have been the whole universe was dispersing too quickly, and on the other side, galaxies could have never formed because it would have crunched in on itself before it got to that stage. DAVIS: Well certainly life would never form. Everything would happen so quickly that it would be all over in an incredibly short time. So the universe, is an amazingly fine-tuned environment, and physicists are very keen to understand how it came to be this way. You'll find the whole history of these twentieth century cosmological discoveries, and the bigger implications for everyday life, in Day Star's new book, Show Me God.
If todays physicists are very keen to understand how the universe came to provide such an amazingly fine-tuned environment, why does science go out of its way to avoid the intelligent design hypothesis? Obviously, there are plenty of religious extremists today who assume that God cannot use natural processes; but arent many scientists just as biased when they assume that the fine-tuning they observe cannot be the result of a purposeful Designer? Home Page Interview Forum Resources Info
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