How many completely different types of bacteria are there?
To me, that greatly reduces the possibility of evolution as an explanation for the origin of life....
I'm pretty sure they do not know the answer to that. Saw something a while back that said biologists estimate the weight of all the bacteria in the earth's crust (i.e., living in solid rock, for the most part) is greater than the total weight of all the life forms living on the surface and in the oceans.