The Tactless Bacteria That Mock Evolution

1) Early bacteria had perfect conditions to evolve, and didn't

Ideal environments and near-infinite attempts, yet the kind stayed the same
Bacteria are thought to have first appeared on Earth about 3.5 billion years ago. They had every condition for evolution. Their numbers were unimaginable; there are more bacteria on Earth than stars in the universe. A generation took about 20 minutes, and mutations poured out constantly. There were billions times billions of attempts. Completely new kinds of organisms should have appeared. But as the saying goes, mountains are mountains and water is water. Bacteria are still just bacteria.

2) Lenski's long-term E. coli experiment shows the limits of adaptation

Tens of thousands of generations of observation: new functions, same organism
Look at Richard Lenski's experiment, begun in 1988. E. coli has been observed for tens of thousands of generations. In human terms, that's hundreds of thousands of years. Around generation 30,000, some of the E. coli became able to use citrate in the presence of oxygen. A new function had appeared. There was change and adaptation. But not a new kind of organism.

3) The "constrained pathways" defense and its contradiction

Admitting structural limits clashes with the evolution hypothesis
Evolutionists respond that "pathways are constrained": life can only move on top of structures that have already been built, so certain directions are hard to reach. Isn't that a denial of evolution?

4) Cell mergers happened once, and the mechanism can't explain why

The rarity of the jump to multicellular life and of endosymbiosis
"The big change from single-celled to multicellular life was rare, and in particular the event where cells fully merged happened essentially once. Other common changes, like eyes and wings, arose many times. Why didn't this crucial merger ever happen again?" Evolutionists stumble over this one.

Conclusion: what observed data says about the limits of evolution

Random variation plus long time has biological limits
In the end, even with the overwhelming reproductive power and mutation rate of bacteria, no fundamental change in the structure of the organism took place. That leaves one answer: evolution has limits.