How Do You Know a Car Wasn’t an Accident?
Imagine coming across a car parked in an empty field, engine idling. No one would seriously entertain the idea that wind, rain, and a few million years of erosion had assembled it from raw ore and crude oil. Why not? Not merely because a car is complicated — a rockslide is complicated too, and no one calls a rockslide designed. The difference is that a car exhibits a specific signature: many separate parts, each individually useless, arranged in a precise order toward a single purpose (motion), built from materials that do not naturally arrange themselves that way, and following a blueprint that exists nowhere in the metal itself. That signature — ordered complexity aimed at a function, requiring information external to the materials — is exactly what human beings recognize as design every single time we encounter it, whether in a car, a wristwatch, or a sentence written in the sand.
Now consider what lies inside a single one of your own cells. Every marker present in that car is present there too — multiplied many times over, in engineering that no human factory has matched, and running continuously in trillions of copies inside you right now.
A Factory Even Its Own Biologists Call a Factory
This is not merely a creationist's turn of phrase. In 1998, biochemist Bruce Alberts — then president of the U.S. National Academy of Sciences, no friend of intelligent design — wrote in the journal Cell that biologists have “always underestimated” the cell, which he said “can be viewed as a factory” containing “an elaborate network of interlocking assembly lines” built from “large protein machines.” Asked why he reached for that word, Alberts explained that these protein assemblies, “like machines invented by humans,” contain “highly coordinated moving parts.” That is the field's own leading vocabulary now, chosen because ordinary biological language stopped being adequate once researchers could actually watch these structures work.
The Cell’s Power Plant: A Turbine That Manufactures Energy
Every cell runs on a molecule called ATP, spent constantly to power nearly everything the cell does. ATP is manufactured by a literal rotary motor called ATP synthase, embedded in the membrane of the mitochondria. A stream of protons flows through it the way water flows through a hydroelectric turbine, and that flow physically spins an internal rotor — measured experimentally at well over one hundred revolutions per second, over 6,000 RPM — which forces a mechanical change in three surrounding catalytic sites, and out comes ATP, three molecules per full rotation. It is, without exaggeration, a rotary engine that converts one form of energy into mechanical torque and then into a chemical fuel your body's cells spend by the billions of molecules every second, small enough that millions could fit across the width of a human hair.
An Outboard Motor Rated at 20,000 RPM
Many bacteria swim using a flagellum — a whip-like propeller driven not by a chemical muscle but by an actual rotary motor built into the cell wall, powered by a flow of ions rather than gasoline. Published measurements put its typical top speed above 20,000 RPM, with some species clocked above 50,000 RPM — faster than a Formula One engine, which tops out near 15,000 RPM. The motor self-assembles from roughly twenty different proteins in the correct sequence, can reverse its direction of spin in milliseconds to let the bacterium change course, and converts its fuel to motion at an efficiency approaching 100 percent, a figure no engine built by human hands has ever equaled.
Delivery Trucks on a Protein Highway
Cells must move cargo — proteins, vesicles, whole organelles — from where it is made to precisely where it is needed, sometimes across distances enormous on a cellular scale. A family of proteins called kinesins handle this by literally walking, hand-over-hand, along protein filaments called microtubules that function as an internal highway system. Each kinesin takes discrete 8-nanometer steps, one foot releasing and swinging forward as the other holds fast, consuming one molecule of ATP per step and covering roughly 750–800 nanometers every second while gripping its cargo. Scaled to the force a kinesin can generate relative to its own tiny mass, the equivalent for a full-grown man would be lifting more than 40,000 loaded Boeing 747s — not moving them, lifting them, and continuing to walk while doing it. A related motor, dynein, hauls cargo the opposite direction along the same tracks, and the cell coordinates which trucks travel where, and when, without a dispatcher standing over any of them.
A Library Compressed Smaller Than a Speck of Dust
Every instruction for building and running the human body is written in DNA using a four-letter chemical alphabet, and the information density involved is difficult to overstate. Researchers have already achieved a data storage rate of 215 petabytes — 215 million gigabytes — recoverable from a single gram of DNA, error-free, with a theoretical ceiling closer to 455 exabytes per gram. Your own diploid genome, spelled out in full, holds the equivalent of roughly 1.5 gigabytes of information, compressed into a cell nucleus about six micrometers across — far too small to see without a microscope, and multiplied by tens of trillions of cells in a single human body. Researchers have noted, without any theological interest in the observation, that all of humanity's recorded data could in principle be stored in a container roughly the size of a couple of pickup trucks, if written in DNA. No human information-storage technology, digital or analog, approaches that density even remotely.
Spell-Check Built Into the Copy Machine
A library this dense would be worthless if it could not be copied accurately, and here the cell goes further still: it edits itself as it writes. DNA polymerase, the enzyme that copies your genetic code before every cell division, includes a built-in proofreading function that detects and corrects its own mismatched letters as it goes — a process formally described in 1974 (independently confirmed by a second researcher within a year) as “kinetic proofreading,” decades before human engineers perfected the analogous concept of error-correcting memory in computers. The result: an uncorrected replication error rate of roughly one mistake in one hundred thousand letters is driven down, through proofreading and a second layer of mismatch repair afterward, to roughly one error in every ten billion letters copied — accurate enough that a text the length of the entire King James Bible, copied by hand, would average perhaps one typo every few hundred copies. The cell's protein-building machinery, the ribosome, runs its own separate proofreading system as well, holding its own error rate to roughly one wrong amino acid in every ten thousand — already remarkably low for a process happening continuously at enormous speed and scale, and itself corrected further by cellular quality-control systems that detect and discard misfolded proteins before they can cause harm.
What a Car Doesn’t Do
Every comparison above actually understates the case, because a car cannot do what every one of your cells does routinely: repair its own damaged parts, manufacture spare components on demand, regulate its own systems through internal feedback loops, and — unlike anything human engineering has ever produced — build a complete, working copy of itself from raw materials, correctly, roughly two hundred billion times over the course of an average human life without a factory floor, a foreman, or a single external instruction issued mid-process. If a running car in an empty field justifies inferring an engineer, a self-repairing, self-replicating factory running thousands of coordinated rotary motors, delivery systems, and a self-correcting information archive denser than anything humans have built justifies that same inference far more, not less.
Order, Randomness, and the Third Category
It helps to distinguish three things that are easily confused. A snowflake is ordered, but its order is simple and repetitive — the predictable result of physical law, not evidence of a message. A handful of Scrabble tiles dropped on a table is complex, but random — no message there either, just noise. A functioning sentence, or a working car engine, or a strand of computer code that actually runs, is both complex and specified — arranged toward a particular outcome in a way that could have been arranged countless other, non-functional ways instead. In every case where humans encounter that third category — complexity aimed at a specific function — apart from cases we already know were designed, we recognize a mind behind it instantly and without controversy. DNA is exactly that third category: not simple repetition, not random noise, but a four-letter code specifying working proteins, arranged toward function, exactly the pattern that everywhere else in human experience signals a Designer.
A Christian Perspective
None of this needed to wait for modern biochemistry to be true. Scripture has always described the human body in exactly these terms — not the product of chance, but the deliberate handiwork of a Maker who knew precisely what He was building.
Paul's argument in Romans 1 is the very argument this article has been making about the car in the field, applied to the whole created order: the things that are made testify plainly to the One who made them, leaving no honest excuse for concluding otherwise. A rotary motor spinning at 20,000 RPM, a turbine manufacturing your body's fuel, a library denser than any human archive, and a copy-editor built into the copying process itself are not the leftovers of undirected chance. They are, on the very same reasoning by which anyone would recognize a car as engineered, the signature of a Designer — and Scripture has named Him from the first page: “In the beginning God created” (Genesis 1:1).
Sources drawn from Bruce Alberts, “The Cell as a Collection of Protein Machines: Preparing the Next Generation of Molecular Biologists,” Cell 92:291 (1998); published structural and kinetic studies on ATP synthase (Stock, Leslie & Walker, Science, 1999; Kulish et al., Scientific Reports, 2016); reviews of the bacterial flagellar motor including Nakamura & Minamino, Biomolecules (2019) and related structural biology literature; kinesin biomechanics research (Svoboda et al.; Andreasson et al., eLife, 2015); DNA data-storage research including Erlich & Zielinski, Science (2017) and subsequent high-density encoding studies; and foundational and recent work on kinetic proofreading in DNA replication and translation (Hopfield, PNAS, 1974; Ninio, 1975; and subsequent fidelity studies). Updated September 2026.