Finn Brooks: Clara, hey — okay, I have been genuinely unsettled since Tuesday and I need to talk about it.
Clara Bennett: Unsettled how — like a good unsettled?
Finn Brooks: Like, someone built something in a lab dish at the University of Minnesota that feeds itself, copies its own DNA, pinches in half, and then — the two halves do it again. In twelve hours. And the people who built it are saying, with a straight face, that it is not alive.
Clara Bennett: That is — yeah, that's the itch. That's exactly where we're going today.
Finn Brooks: SpudCell. That's what Kata Adamala and Aaron Engelhart's team at the University of Minnesota Twin Cities are calling it, and the preprint dropped July 1st, 2026, and I — wait, the question I actually want answered is: if it does all of that, what exactly is it missing?
Clara Bennett: Hold on — how many molecules are we talking? Like, is this an enormously complex system?
Finn Brooks: That's the part that wrecked me. One hundred fifty to two hundred molecules. That's it. Not thousands, not some incomprehensible soup — it's almost like, imagine snapping together a couple hundred LEGO bricks, not alive, just plastic, and then the pile starts eating, copying itself, and splitting into two piles on its own. That's basically what happened.
Clara Bennett: And those are all non-living components assembled from scratch — bottom-up, not starting from any existing cell.
Finn Brooks: Right — but the way it splits isn't random. There are genetically encoded surface proteins that reach out and tug against streptavidin — that's a specific protein in the environment — and that tension deforms the membrane until it pinches off into two daughter compartments. That's not an accident, that's engineered mechanics.
Clara Bennett: So the division instruction is baked into the DNA. And yet Adamala — the person who built this — turns around and says it's obviously not living.
Finn Brooks: Which — I mean, she's the one who made it, so I'm not going to argue, but I want to know what she's actually pointing at.
Clara Bennett: The ribosomes. That's the load-bearing gap. SpudCell cannot synthesize its own ribosomes — those are the molecular machines that actually translate DNA into proteins — and it doesn't try to. They're handed to it externally. Every nutrient, every piece of molecular machinery it runs on, comes from outside. The lab is doing what metabolism would do in a living cell.
Finn Brooks: Wait, so it's less like a cell and more like... a cell that's permanently on life support?
Clara Bennett: That's a fair way to put it, yeah. And the division problem makes that worse — actually, no, it makes it different in a specific way. When SpudCell splits, the DNA may not distribute evenly between the two daughters. Which means one daughter might get a fuller copy of the genome and one might get... less.
Finn Brooks: So it splits, but the inheritance is messy.
Clara Bennett: Messy in a way that matters. Heritable evolution requires that when you divide, the thing you pass down is a reliable copy. If the DNA distribution is uneven, what you're passing on is — in practice — a partially random sample of the genome. That's not heritable evolution in the strict sense. It's close. It resembles it. But the fidelity isn't there yet.
Finn Brooks: Okay that actually reframes the 'not living' label for me — like it's not a philosophical judgment, it's a checklist item that specifically isn't checked.
Clara Bennett: But checklist is actually the interesting word — because Adamala's team didn't stop at division. They ran genetic modifications on SpudCell populations and watched them compete. And that is — that's where the checklist gets harder to close.
Finn Brooks: Wait, compete — like, two populations, different modifications, one wins?
Clara Bennett: Selection dynamics, yes. You modify the genome, you introduce variants, and certain variants outperform others. That's — in biology, we call that Darwinian competition. We don't usually apply that word to a chemistry set.
Finn Brooks: No but — okay, picture a grad student at University of Minnesota, it's Tuesday afternoon, she's got two SpudCell populations on a bench, different genetic edits in each, and by Thursday she's tallying which variant is pulling ahead. That's a race. With runners built from spare parts that morning. And she's watching natural selection happen in a dish that is, by official classification, not alive. I mean — that's the friction point, right? Because Adamala also said, and I'm going to read this exactly: 'We've replicated in chemistry what only used to be possible in biology: the complete set of behaviors of a cell. It proves that the most fundamental functions of life, like growth and replication, do not need a mysterious magical spark.' So — obviously not living, but also, no magical spark required. Both of those can't be comfortable to hold at once.
Clara Bennett: They can, actually — if you let go of the binary. That's maybe the thing this whole experiment is really forcing.
Finn Brooks: John Glass — synthetic biologist at the J. Craig Venter Institute — called it 'a landmark event in the history of biology.' Not biochemistry. Biology. That's a pointed word choice.
Clara Bennett: And he's not wrong — but landmark doesn't mean it crossed the line. It means the line is now visibly inadequate.
Finn Brooks: Which — yeah, and I can't shake this. Because if SpudCell evolves under selection pressure, bottom-up, assembled from non-living parts, then the hallmarks of life aren't a wall. They're a... gradient you can inch toward from the chemistry side.
Clara Bennett: And that question — what gets you the rest of the way, autonomy, ribosome synthesis, clean heredity — that's exactly what makes this stranger, and we're not done pulling on it.
Finn Brooks: That 'gradient you can inch toward' framing — it's doing a lot of work, and I want to pull on it, because the RNA World hypothesis is basically built on that premise, right? Decades of protocell research, all of it saying life didn't snap into existence, it assembled capability by capability.
Clara Bennett: That's exactly the lineage SpudCell sits inside. RNA World, minimal cell projects — all of it is chipping away at the same question from different angles. SpudCell isn't a rupture from that tradition. It's maybe the furthest that tradition has gotten.
Finn Brooks: Which means the definition of life has been quietly unstable for decades and SpudCell just — forced us to look at it.
Clara Bennett: Scientifically unresolved is the honest phrasing. Not unstable — unresolved. There's no agreed canonical definition. SpudCell satisfies growth, replication, division, competitive evolution. It doesn't satisfy metabolic autonomy, clean heredity, ribosome synthesis. So which checklist are you using?
Finn Brooks: Wait — so the reason 'is it alive' is a bad question isn't just philosophical hand-wraving, it's that we actually never locked down the criteria.
Clara Bennett: Right — and the ribosome gap is the one that doesn't quietly close with more engineering. I mean, ribosomes are how genetic information becomes physical structure. SpudCell borrows them from outside. That's not an oversight waiting to be patched — that's the difference between a system that runs itself and a system that needs a caretaker to keep restocking the shelf.
Finn Brooks: So the more productive question is — what autonomy threshold has to be crossed next? Like, actually, no — it's: which biological capabilities can we keep engineering into non-living chemistry before the 'not living' label becomes untenable?
Clara Bennett: And that's a scientific question and a philosophical one, and the two don't resolve on the same timeline. Science can close the ribosome gap eventually. The definition question — that one might stay open longer than the engineering does.
Finn Brooks: That image from the opening — the thing in the dish, splitting every twelve hours — I keep landing back on that, and it feels different now. Like, when I first said it, it sounded like 'wow, wild science thing.' But now I'm thinking about Adamala building it with her hands, feeding it ribosomes from outside, watching it compete, and still saying — with full confidence — 'obviously not living.' And Glass over at J. Craig Venter calling it a landmark in the history of biology. And both of them are... right? That's the part I didn't expect to walk away with.
Clara Bennett: The preprint is July 1st, 2026 — not yet peer-reviewed. So the story genuinely isn't finished. Which, in practice, means that discomfort you're describing is exactly the right place to sit. Not resolved. Just — visible now.
Finn Brooks: A lipid droplet in a Minnesota lab dish. No magical spark — Adamala said that. Just chemistry, arranged carefully enough to act like something alive. That's where the decade ahead starts.
