A Quick Reply
Hmm, seems like little has changed around here over the past two years. This place is a lot bigger now, granted, but when I left to Brazil to serve as a missionary for the Church of Jesus Christ of Latter-day Saints two years ago I think we were still debating this topic. Honestly, I think its kind of funny.
I won't bother to make an elaborate argument here, I simply don't have the time (I have a QM test tommorow that I should really be studying for right now). But, there are just a few things that I wanted to mention:
First, I was suprised by how bitterly some of the people who have posted oppose the LDS church. Your comments were entirely unreasonable and, as far as I know, unprovoked. I just don't understand, why the bitterness? Making such flagrantly uneducated statements just damages the credibility of anything reasonable you might have pointed out. Leaders of my Church have emphasized repeatedly that church members treats others of different faiths with respect and civility. I don't see why others can't afford us the same luxury.
Second, The Book of Mormon does not claim that Lehi and his family were the only group of people ever to inhabit the early Americas. In fact, it specifically mentions other groups of people who migrated to the American continent (Jaredites, Mulokites, and others for example). In Christ's recorded dealings with Lehi's descendants, he suggests that there were many other groups of people on the American continent. And, perhaps most importantly, the book does not ever suggest that other groups of people could not have migrated to the Americas, it actually suggests the contrary in several instances.
I don't want to get into complex gentic evolution debates here-frankly that's way out of my league, biology never was my strong suit-but its seems to me that much of what quantumcarl posted would actually serve to confirm the Book of Mormon's validity. There are also many other evidences available for those wishing to "prove" the book's validity. I won't post them because they honestly don't interest me that much (that and I really need to get to my studies), but I'm sure you could easily find them on the internet.
To anyone interested in what Mormon scholars have said about reconciling science with religion, I would recommend the book "Reflections of a Scientist." It was written by Henry Eyring, a brilliant chemist (even the Nobel website has suggested he was one of the most deserving scientists ever to be skipped over for a Nobel) and also an outstanding member of the Church. In it he talks about how he doesn't see any need to reconcile, per se, religion and science. Rather, he shows how, to him, they are really just compliments of one another, eaching adding to and enriching the other.
To finish, I wanted to make a specific reply to SkyHunter's last post about religious arrogance. Mormon's do not claim to know "all" truth, and we certainly have not stopped seeking it nor stopped trying to learn more of it! It is part of our doctrine, in fact, that while on Earth
no one can know "all" truth. Anyone familiar with Mormon scripture would tell you that it repeatedly emphasizes the importance of
continually seeking after truth. That really is what we try to do-humbly seek after truth. That's why I'll be studying tonight for my Quantum test tommorow. That's also why I'll read in my scriptures tonight.
Also, I just do not see how you can call the "presumption" of knowing eternal truths and values arrogant. We do not claim to have discovered them, or found them out through reason or any other method. Mormon doctrine teaches that such knowledge was given to
everyone by a loving and wise Heavenly Father who has knowledge of all things. Such knowledge can be added to through obedience and dilligence, or diminished-but never extinguished-by disobedience and rebellion.
I hope this helps you to understand a little better our beliefs. Perhaps you can help me better understand genetic evolution someday when I don't have a test to study for

This really was meant to be a respectful post, and I hope it came off that way. If not, my apologies.