In 1988, Richard Lenski launched an experiment with twelve populations of E. coli. Thirty-seven years have passed. The experiment has surpassed 80,000 generations — the equivalent of roughly 1.6 million human years.

Richard Dawkins called it “a beautiful demonstration of evolution in action” in The Greatest Show on Earth. Jerry Coyne called it “a poke in the eye for creationists.” A Veritasium video with millions of views declared it “one of the most direct demonstrations of Darwinian adaptation by natural selection you can imagine.”

So after 80,000 generations, what has E. coli become?

First, Let’s Correct the Misunderstanding

Evolutionists often claim that Lenski’s experiment makes creationists uncomfortable. That isn’t true.

Creationism predicts microevolution — variation and adaptation within existing genetic information — from the outset. If a Creator designed organisms with flexibility to adapt to changing environments, it follows naturally that E. coli would optimize for a glucose-limited flask. What creationists contest is not the existence of natural selection. What they contest is the claim that natural selection can generate entirely new functional information from nothing.

For macroevolution — single cell to human — to be explained, we need to observe the spontaneous emergence of new protein folds, new biochemical pathways, and new developmental programs. Lenski’s experiment has failed to show any of these. That is the heart of the debate.

The Citrate Affair

The most celebrated finding of the LTEE is the emergence of aerobic citrate metabolism at around generation 31,500. A population that could not feed on citrate in the presence of oxygen gained that ability. Evolutionists called it “the origin of a new function.” Three facts deserve scrutiny.

The 2024 Proto-Gene Discovery — A Real Breakthrough?

A 2024 analysis of LTEE genomes (Uz-Zaman et al., PLOS Biology) identified cases where previously unexpressed DNA regions had begun to be transcribed and translated — so-called “proto-genes.” Some evolutionists called this “evidence of de novo gene birth.”

Two critical limitations deserve attention.

First: these proto-genes were formed primarily by recruiting existing promoters. The regulatory information was not newly created; existing regulatory sequences were repositioned.

Second: the function of these transcripts remains unconfirmed. The paper itself acknowledges this. Transcription is not the same as function. A gene requires both stable expression and a beneficial function. This study demonstrated only the first.

A Question for Evolutionists

If a completely new protein fold had appeared in this experiment, how would the evolutionary community have responded? With enormous fanfare, no doubt. It did not appear. And on that point, the evolutionary community is quiet.

Lenski’s experiment continues. Jeffrey Barrick has taken it over and continues to press forward. Perhaps something new will emerge someday, they say. But is that expectation a scientific prediction — or a statement of faith?

What thirty-seven years of experiment has taught us is this: the information inside E. coli was there from the beginning. Natural selection can filter it. It cannot create what was never there.