So I ask if you know if scientists conjecture what that first item on the earth was. I hope you understand the question. (I don't mean the elements of the periodic table, which of course I studied in chemistry class, but whether scientists know for sure what exactly was the first item -- that began evolution on the earth. ok? I hope you understand the question...thanks.) OK, not "know for sure," because even though I learned evolution and studied biology in school, I realize science, it seems, doesn't know anything for "sure." So forget that. Just what do scientists think, believe, or conjecture was the first item that moved to life that was on the earth. (Whew, that was hard to ask since there are so many caveats with these questions...<smile>)