You misunderstand. I didn't mean evidence for a particular abiogenesis hypothesis. There is lots of evidence of life that begins at around 3.5 billion years ago. It had to get there somehow.
How exactly it got there is an unknown in science - why would we treat it differently from any other unknown in science? Why do you want to think it's magic?
That's an excellent point. Even though
@shmogie is apparently ignoring me in typical creationist fashion, I considered posting the following to him. I wrote it several years ago, but I think it generally still applies....
Why do I, and so many other scientists, believe life on earth first developed by natural means? Well, at the most basic level it's simply a question of extremely consistent observations. Being in the life sciences myself, I've spent the better part of my life studying life in various forms. I've seen how it replicates itself, how it adapts and evolves to changing conditions, and how it generally goes about its business. In all of these observations, there's one consistent underlying theme that never changes: It does it all by itself. IOW, everything life on earth does, it does by natural means. We can explain the most amazing processes without any need to throw our hands up in the air and say, "Huh! I think some god just did that!"
From an even broader perspective, we can look around and see other non-biological processes in chemistry, geology, climatology, cosmology, physics, etc. and all of them operate without the need for a deity to prop the whole thing up. I guess a simplistic way to put it would be: Nature works quite well all on its own. Now, perhaps there's some supernatural agent working behind the scenes in some undetectable manner, or perhaps a deity set up the rules that run the whole works and let it go from there, but there's really no way to tell.
In light of all that, I see no reason to suddenly inject a supernatural agent when considering the development of the first life on earth.
The second "big picture" line of reasoning comes from the fossil record. When we examine it as a whole, we see a clear, unmistakable progression from simple prokaryotes to life that resembles contemporary organisms. We also notice that the first two-thirds of the history of life on earth were devoted solely to cellular evolution. The fossil record of this period looks like....
Rocks dated at 4.1 billion years ago (BYA) show no evidence of life.
For the next 2 billion years, the only fossils are of prokaryotes (single celled organisms with no membranous nucleus or organelles).
At 2.1 BYA, the first eukaryotes (single celled organisms with a nucleus) appear.
At 1.1 BYA, we see the first evidence of very simple multicellular organisms.
From this we see a very clear indication that when life on earth first started, it did so as a very simple pre-prokaryote, which is precisely what we would expect if it occurred naturally. I mean, if a deity wanted to make sure we understood that he did the whole thing, it would be a very powerful message to start it all off with humans or some other less primitive organism.