Life's defining characteristics can be recreated from nonliving materials
In a Minnesota laboratory, scientists have crossed a threshold long imagined but never quite reached — assembling a synthetic cell from nonliving chemical components that grows, divides, and passes traits to offspring. SpudCell does not emerge from nature's lineage; it is engineered from the ground up, a 90,000-base-pair genome directing processes once thought exclusive to the living. The achievement is less a declaration that artificial life has arrived than a demonstration that life's defining properties can be coaxed from inert matter — and a quiet reminder that such power carries obligations we have not yet fully defined.
- Scientists at the University of Minnesota have built SpudCell, a synthetic cell assembled entirely from nonliving components that can grow, replicate DNA, divide, and pass beneficial mutations to daughter cells.
- The team demonstrated natural selection in miniature — faster-growing mutant cells outcompeted slower ones across generations, compressing one of evolution's oldest forces into a controlled petri dish.
- SpudCell remains fragile and dependent: it cannot survive outside the lab, borrows its protein-making machinery from E. coli, and only 30 percent of daughter cells inherit a complete genome after five divisions.
- Researchers are candid that this is a milestone toward synthetic life, not synthetic life itself, with next steps focused on making SpudCell more self-sufficient and capable of generating its own molecular machinery.
- Even as the science advances, the team warns that increasingly capable synthetic cells will outpace existing safety frameworks, calling for biosecurity guardrails before the technology reaches a threshold that demands them urgently.
In a University of Minnesota laboratory, scientists have assembled something that behaves like life without being alive in any way nature intended. SpudCell — built entirely from nonliving chemical components — can grow, replicate its genetic material, divide into daughter cells, and pass beneficial traits to its offspring. Published as a preprint on bioRxiv, the work represents what the team calls a major threshold in the long effort to create artificial life from scratch.
Unlike approaches that strip down existing organisms, the Minnesota team built SpudCell from the ground up. At its core sits a 90,000-base-pair synthetic genome that directs protein production, DNA copying, nutrient consumption, and cell division. To test whether the system could exhibit natural selection, researchers introduced a mutation that made some cells grow faster — and over generations, those variants came to dominate the population. It is evolution compressed into a petri dish, orchestrated by human hands.
Yet SpudCell is far from self-sufficient. It cannot survive outside the lab, depends on externally supplied nutrients, and borrows its protein-making ribosomes from E. coli rather than generating its own. After five generations, only about 30 percent of daughter cells inherited a complete synthetic genome. The researchers describe their work honestly as a key milestone toward synthetic life — not synthetic life itself — and acknowledge how much remains unknown about what makes life truly autonomous.
Alongside the ambition runs a note of caution. The team explicitly calls for biosafety and biosecurity frameworks to develop alongside the technology, recognizing that as synthetic cells grow more capable, the potential for misuse grows with them. The work has not yet been peer reviewed, but it points clearly toward a future where systems behave more and more like life — and where the question of what we build, and why, will matter as much as the question of whether we can.
In a laboratory at the University of Minnesota, scientists have assembled something that behaves like life without being alive—at least not in any way nature intended. They call it SpudCell, a synthetic cell built entirely from nonliving chemical components, and it can do things that only living things are supposed to do: it grows, it replicates its genetic material, it divides into daughter cells, and it passes beneficial traits to its offspring. The work, published Thursday as a preprint on the bioRxiv server, represents what the research team describes as a major threshold crossed in the long effort to create artificial life from scratch.
The achievement is genuinely novel in its approach. Rather than starting with an existing organism and stripping it down, the Minnesota team built SpudCell from the ground up using chemically defined, nonliving components. At its core sits a 90,000-base-pair synthetic genome—a complete set of genetic instructions small enough to be manageable but complex enough to do real work. That genome directs the cell to manufacture proteins, copy its own DNA, consume nutrients, expand in size, and eventually divide into two daughter cells. None of this happens in nature; all of it happens in a carefully controlled laboratory environment.
To demonstrate that SpudCell could exhibit something resembling natural selection, the researchers introduced a genetic mutation into some of the synthetic cells, making them grow faster than their unmutated siblings. Over several generations, the faster-growing variants outcompeted the slower ones, becoming increasingly dominant in the population. It is a miniature version of the process that has shaped all life on Earth, compressed into a petri dish and orchestrated by human hands. The team frames this as evidence that life's defining characteristics—growth, reproduction, heredity, competition, adaptation—can be recreated from nonliving materials.
Yet SpudCell remains far from self-sufficient. It cannot survive outside the laboratory. It depends entirely on externally supplied nutrients and specialized molecular components to function. The synthetic cells rely on ribosomes—the protein-making machinery—that researchers harvested from E. coli bacteria rather than manufacturing from scratch. After five generations of division, only about 30 percent of daughter cells inherited the complete synthetic genome intact; the rest were incomplete or defective. These are not minor limitations. They underscore how far synthetic biology still is from producing truly autonomous artificial organisms.
The researchers are candid about what they have and have not accomplished. They describe their work as a "key milestone" toward synthetic life, not as synthetic life itself. The system demonstrates that many of life's core properties can be engineered into nonliving matter, but it also exposes how much remains unknown about what makes life robust, self-sustaining, and capable of thriving without constant external support. The team's next steps will focus on making SpudCell more independent—regenerating its own molecular machinery, improving how genetic material gets distributed during cell division, and allowing mutations to arise naturally rather than being introduced by researchers.
But alongside the scientific ambition runs a note of caution. The researchers explicitly acknowledge that increasingly sophisticated synthetic cells could raise new biosafety and biosecurity questions. As the technology advances and synthetic cells become more capable and more autonomous, the potential for misuse grows alongside the potential for beneficial applications. The team calls for the development of a safety and security framework for synthetic cell engineering—a recognition that this kind of progress, once it reaches a certain threshold, will require guardrails. The work has not yet undergone peer review, but it signals where the field is heading: toward systems that behave more and more like life, in ways that will demand careful thought about what we build and why.
Notable Quotes
One of the most ambitious and fascinating goals of bioengineering is to build a biochemical system that could cross the threshold from chemistry to life— University of Minnesota research team
The progress highlights the urgent need to develop a safety and security framework for future synthetic cell engineering— University of Minnesota research team
The Hearth Conversation Another angle on the story
When you say it grows and divides, what's actually happening inside that synthetic cell?
The genome is instructing the cell to make proteins, which do the work of building more cellular material. As it accumulates enough mass, it reaches a point where it can split into two. It's mimicking what living cells do, but every step is happening because we engineered the chemistry to work that way.
And the natural selection part—that's the mutation you introduced?
Yes. We made some cells grow faster by tweaking their genetics. Over generations, those faster ones outcompeted the slower ones. It's natural selection, but we set the initial conditions. In nature, mutations arise randomly. Here, we chose which ones to introduce.
Why does it matter that only 30 percent of daughter cells got the complete genome?
Because it shows the system is fragile. Real cells have error-correction mechanisms we haven't built in yet. If you want something that can actually survive and thrive independently, you need much higher fidelity. Right now, SpudCell is more like a proof of concept than a working organism.
What are they worried about with biosecurity?
If you can engineer cells to grow, divide, and evolve, eventually someone might engineer them to do something harmful. Right now SpudCell can't survive outside the lab, so the risk is low. But the technology is advancing. The researchers are essentially saying: we need to think about safety before we make something truly dangerous.
Is this artificial life?
Not yet. It behaves like life in some ways, but it's completely dependent on us. It can't feed itself, can't repair itself, can't exist without our help. It's more accurate to say we've created a system that exhibits some of life's properties. The real question is whether we're on the path to something that could be called alive.