If some atheists knew that science says all the millions of plant and animal species along with their family and friends all came from the same single cell they might not be so confident in their beliefs. Right now a lot of atheists think "OK we're descendant from the apes" and they stop there because that can be somewhat believable. But they don't go back any further in time. If they did go all the way back it would be more difficult to believe and their faith in atheism might not be as strong.
This looks like the same empty claim that opened the thread. Since we're now about 1000 posts in, there must either be evidence of the claim, or the baseless repetition of the claim is evidence that Disciple of Christ is not capable of substantiating his opinion.
Is there a credible peer-reviewed publication which says that the common ancestor of all life today is a single cell? Not a pool of single-celled organisms, but a single cell? Frankly, I WOULD be skeptical of that claim, and would like to read the evidence used to justify it, if a reputable scientist is actually making such a claim. I assume, unless there is evidence to the contrary, that it is only Disciple of Christ who is making this claim, because he doesn't understand scientific claims and can't be bothered to try.
I assume, until I see evidence to the contrary, that established science claims only that single-celled organisms (rather than a single single-celled organism) gave rise to all the more complicated forms of life. My understanding is that, since conditions on the early earth were so different than conditions today, no scientist can state with any confidence even what sort of one-celled creatures inhabited the early earth. The only claim I've heard is that single-celled life arose quite early in the earth's history, within the first billion years of the earth's existence. Single-celled life was the only life on earth for a couple of billion years after that.
At some point, the pool of single-celled organisms gave rise to multicellular creatures, which continued to diversify and became every species (plant and animal) surviving on earth today. A recent show on the Science Channel,
Snowball Earth, informs me that the earliest evidence of multicellular life is fossils from a mine in China.
I doubt that any atheists would have a problem with the claim that all life evolved from a pool of single-celled organisms, or that many atheists are unaware of it. If Disciple of Christ would be so kind as to provide a list of atheists who reject the notion that every species alive today evolved from one-celled organisms, I'll be happy to donate $10 per name (up to a total of $100) to the church or charity of his choice, for each living atheist who is on the record as taking such a stand as of midnight, 4/14. I personally doubt that he can name even one, but we'll see.