Done that. Your cells in your body are eukaryotic. That means they are more complex than the bacteria, which are prokaryotic. Eukaryotic organisms take longer to reproduce than prokaryotic organisms. If the simple prokaryote, E.coli, cannot change in 2 million generations, by what stretch of the imagination is it going to be simpler for a eukaryote to change?
Evolutionary estimates are that it took about a billion years for a single-celled organism (presumed by them to be a prokaryote) to evolve enough to become a multicellular organism with differentiated cells. Today in a Petri dish, prokaryotic cells can divide in as little as ten minutes. Let's be really generous to evolution and give them a day in the wild state (this is generous because it allows fewer generations in a billion years. If someone protests, I encourage that person to go ahead and multiply the figures below by the appropriate amount to get a faster generation time.)
That's 365 generations in one year.
Times a billion years.
That's 365,000,000,000 generations.
The generation time for many birds, mammals, reptiles, amphibians, and even plants averages about a year.
If it took 365,000,000,000 generations to get from single-celled to multi-celled, just how many generations are supposed to get from fish to man, a much, MUCH more complex series of genetic changes?
Yeah, evolution just ran out of time.The whole universe isn't even old enough given what we see in the DATA.