Originally posted by .::Tin Can::.
When taking a swing at something as big as something we wont ever know, then yes, I'd rather see it myself.
In the end, can we prove any of it? Not really. We can look at things, try and find out how far back they date, maybe relate them to another species, but I refuse to believe we started out as bacteria.
We can prove the mechanisms (and have). Your (apparent) definition of proof would require time travel and observation of every animal that has ever lived; so it's really a definition designed to make proof seem impossible.
You also make the assumption 'we'll never know', which I've noticed is a cornerstone of ID type ideas and the complete antithesis of science. Although we have evidence of both micro and macroevolution anyways, like equine fossils (equine evolution has a very good fossil record), and the observation of things like bacterial adaptation against penecillin, or insects against pesticide.
On the subject of macroevolution, we have strong evidence for common origin; for example, out of the 320 naturally occuring amino acids, all known life uses the same set of 22 to build proteins. There is also the sharing of 'ubquitous' genes, which exist across all known life and appear to fulfill a common purpose (i.e. would come from a base source). The same 4 nucleic acids (guanine, thymine, adenine, cytocine) form all known DNA/RNA.
So we have evidence of macroevolution, and demonstrated microevolution on the lab (which in itself demonstrates the principles of macroevolution). We have a weight of evidence supporting a common ancestor, and a nested evolutionary hierarchy, including fossil evidence of transitionary forms (including of the
homo genus, even if the 'missing link' is still to be found).
And this is in spite of the inherently incomplete nature of fossil evidence.
Technically, we started out as a series of chemicals that formed (evolved) into polymers, amino acids and soforth, and then bacteria.
To rephrase karas argument;
We find a tree lying in the woods. We know that all trees can fall down, and that all grow vertically (so their leaves can reach the sun for photsynthesis). We also know the roots should be in the ground to draw up water. Additionally, we can see the trunk, etc, is identical to surrounding trees (which, of course, are known to only grow vertically). The tree may also appear dead or decaying.
But in your mind, you can't decide whether it fell down or started like that?