All evidence demonstrates no such thing.<quoted text>
RR, it's because all evidence demonstrates that evolution from a single ancestor occurred. I take it you didn't read Aero's interesting news piece. Here it is again: http://www.scientificamerican.com/article.cfm...
There is no compelling alternative. Seriously - what would you suggest as an alternative? That an old man dug up mud out of the ocean and made the earth? That the spirits found this garden and decided it needed tending? That some angry deity flooded it in water, killing everything except for an impossibly large boat of an impossible number of creatures who would all leave a genetic bottleneck behind?
The fact is you don't know enough. You actually think that science "doesn't know" which stories have or have not solid evidence behind them. Well, either learn more or admit you don't actually understand enough to comment on this issue and that you're being sensitive because you have a strongly held religious belief.
And, if you do read science, they are quite clear when they are being speculative - no one ever writes "We've proven, beyond any doubt, that X happened. Thus, we know Y did" in talking about the extreme past in science.
Here's an excerpt:
"Theobald says his most surprising results were "how strongly they support common ancestry." Rather than being disappointed about simply backing up a long-held assumption, he says that at least, "it's always nice to know that we're on the right track."
And that's from this number:
"By plugging these sequences into various relational and evolutionary models, he found that a universal common ancestor is at least 10^2,860 more likely to have produced the modern-day protein sequence variances than even the next most probable scenario (involving multiple separate ancestors)."
10 to the power of 2860! That's a smaller chance than there are stars in our galaxy! It's an unimaginably small chance - and you are suggesting that biological science teachers lie to their students and say "well, we don't know for sure. I mean, there's this chance of one over the entire number of stars in the galaxy, and planets, and moons, that we might be mistaken..."
"The error introduced by emotion and philosophy is generally one of exaggerating the force of the facts to settle issues which they do not, and possibly will never, settle." -Buck B. Crick