1. I don't claim to be a big expert on the geological history of the Grand canyon, so I simply go to a basic resource and try to find the answer. Here's one:
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The principal consensus among geologists is that the Colorado River basin (of which the Grand Canyon is a part) has developed in the past 40 million years and that the Grand Canyon itself is probably less than five to six million years old (with most of the downcutting occurring in the last two million years).
I see no reason to doubt this answer. Other folks do. Here's some information about the controversy about this book, written from the pro-creationist side.
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The book was published in May, 2003. It was accepted by and first shipped to the Grand Canyon Association for sale in National Park bookstores in late July 2003. Though reported otherwise, the book has always been sold in the “inspirational” section of the bookstores.
Why does a National Park have an
inspirational (translation: religious) section in its bookstore?
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On January 25, 2004 David B. Shaver, Chief, Geologic Resources Division, National Park Service wrote a memo subjected, “Sale of the Creationist book at Grand Canyon.” It opens with a statement that, in part, says:
“Based on our review, we recommend that the book not be sold in park bookstores because the book purports to be science when it is not, and its sale in the park bookstore directly conflicts with the Service’s statutory mandate to promote the use of sound science in all its programs, including public education.”
(You can also click on a link to see the complete memo, which outlines in a very clear way why
The Grand Canyon: A Different View does not belong in a National Park bookstore. It also makes the point that this is not an issue of freedom of speech or freedom of religion. A book for sale at the National Park bookstore
must meet certain requirements, because it is being sold under the official auspices of the federal government. A book which rejects mainstream science is clearly not appropriate in this setting. Certainly, organizations not officially affiliated with the government have the right to promote and sell this book; but not the government itself.)
Despite Shaver's precisely reasoned analysis of why the book should not be sold in the National Park bookstore, it continues to be available there, as far as I can tell.
How do I "definitely" know? Well, that's where folks who rely on the scientific method get backed into a corner. We're willing to say "Well, I guess it's
possible that the Grand Canyon was actually carved into the Earth by giant laser cannons during the Venus-Mars war of a few thousand years ago." This is sometimes misinterpreted to mean that we don't see the difference between something which is very, very probable, and something which is very, very improbable.
Suffice to say that the evidence that the age of the Earth should be measured in billions of years rather than thousands of years is overwhelming. I do not "definitely know" this, the way the person of faith claims to "definitely know" the dogmas of her religion; but I feel secure enough to say that this is a "fact" of science to as great an extent as anything can be.
2. Well, nobody really "determines" what science is; it defines itself. It's a
method of obtaining a more and more accurate model of the physical universe. It is
not a collection of data and theories; it is the
mechanism by which data is molded into theories, which are then tested. Despite all the heart-warming images we may have of the scientific loner, rejected by her peers for her unconventional theories, the plain fact is that the mainstream consensus of scientific thought is, by far, the best tool we have for understanding reality. When some individual has stood against the mainstream of scientific thinking (for example, Alfred Wegener's idea of continental drift), the radical new idea has gone on to become part of the mainstream through the normal procedures of science. The scientific method is not perfect, but it has the wonderful advantage of being self-correcting. So, yes, peer review by mainstream journals is an excellent way to get closer to the truth.
3. It would be nice to think that even the vast majority of persons of faith reject religiously-based attacks on mainstream science. I'm not so sure. Take a look at this poll on the beliefs of Americans, from 1997.
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God created man pretty much in his present form at one time within the last 10,000 years.
Everyone 44%
Scientists 5%
Pretty close to half of Americans believe that humanity is less than 10,000 years old. These folks would be perfectly happy with
The Grand Canyon: A Different View, I think.
So, I'm not sure if this sort of thing hurts the Religious Right at all. Let's face it; when it comes to religious fundamentalism, you have, for the most part, people who are part of it, and people who are against it. The activities and beliefs of religious conservatives attract roughly as many Americans as they repel. (This would not be true in almost any other nation in the "free world.")