Again I say;<quoted text>
You made the mistake of adding this:
"Then for another 1000 million years(1 billion), there is still no evidence of multicellular life. " and then went on to say that there was no more evidence before 580 million years ago of ancient life. As I said, there are others out there. There are a fair number of imprints in the Vendian which goes back to about 650 million years ago:
So we need to push your numbers back a little bit, but not a lot.
The oldest rocks we find on the earth are about 4 Bya (billion years ago), and they are devoid of any life. The oldest potential fossil evidence for life are fossil bacteria from the Apex Chert of Australia (3.46 Bya), though these fossils are currently embroiled controversy and may not represent traces of life. The next oldest fossils are well-accepted fossil bacteria and bacterial mats (stromatolites) from South Africa that date to 3.4 Bya. Thus, the oldest fossil prokaryotes date to 3.4 to 3.5 Byr. For nearly the next billion years, rocks from the Archean have no multicellular life at all, just prokaryotes. The oldest eukaryote fossils are acritarchs dating to about 1.75 Byr.
I separated this since you tell me that was my mistake to add this in there. Read the link and you can se I did not add it.
"For another 1000 million years, there is still no evidence of multicellular life."
Near the Precambrian/Cambrian transition, only 580 Mya, in the Ediacaran and Burgess shale faunas we finally find the first fossils of multicellular animals. However, they are very unusual, mostly small, soft-bodied metazoans, and most are superficially unlike anything found today. Precisely as we would expect from the standard phylogenetic tree, the earliest fossils of multi-cellular life are very simple sponges and sea anemone-like organisms (sea anemones and jellyfish are both cnidarians). Around 20 million years later, we find the first evidence of simple mollusks, worms, and echinoderms (organisms similar to starfish and sea cucumbers). Another ~15 million years later, the very first vertebrates appear, though most people would strain to recognize them as such. They are small worm-like and primitive fish-like organisms, without bones, jaws, or fins (excepting a single dorsal fin).