“Scientists create life” is an irresistible headline.
It is also usually too simple.
There are at least two very different research programmes that are often compressed into that phrase.
One starts with existing organisms and removes or rewrites biological components until only a minimal living system remains.
The other starts from non-living biochemical components and attempts to assemble the functions required for life from the bottom up.
They should not be confused.
A genetically minimal organism such as JCVI-syn3A belongs mainly to the first tradition. It descends from an existing bacterial lineage but contains a dramatically reduced synthetic genome. In 2026, researchers published a spatial and kinetic whole-cell model capable of simulating its approximately 100-minute cell cycle, including gene expression, metabolism, chromosome dynamics, growth and division. That is an extraordinary achievement in modelling minimal life, but the simulation is not itself a newly created organism.
Bottom-up synthetic-cell research approaches the problem differently.
Instead of simplifying an existing cell, researchers attempt to reconstruct essential cellular functions using biochemical components.
A 2026 Nature Communications study integrated two particularly important functions inside a synthetic-cell system: DNA self-replication and lipid biosynthesis. The importance lies not merely in demonstrating each module independently, but in bringing genetic replication and membrane production into the same artificial cellular system. The authors themselves frame construction of a synthetic cell from the bottom up as an unfinished grand challenge.
Other essential properties of living cells remain difficult to integrate simultaneously: sustained metabolism, energy generation, controlled growth, reliable division, environmental sensing, repair, inheritance and open-ended adaptation.
This is why a collection of life-like functions is not automatically equivalent to a living organism.
There is also a conceptual problem.
Life does not have a universally agreed engineering checklist.
If researchers build a compartment that maintains itself, copies genetic information, metabolizes resources and divides, at which exact point does chemistry become biology?
Nature offers no obvious switch.
Existing organisms are products of billions of years of continuous evolution. A laboratory-built system has a different history. It may reproduce many functions associated with life without sharing that history.
That does not make the achievement less important.
It makes the question more interesting.
What the evidence supports
Researchers can now construct and integrate multiple biochemical modules associated with cellular life.
Minimal living cells are sufficiently characterized that researchers can model remarkably large portions of their complete life cycles.
Bottom-up systems are becoming progressively more integrated rather than demonstrating isolated cellular functions one at a time.
What the evidence does not support
Scientists have not yet demonstrated a generally accepted, fully autonomous living cell constructed entirely from non-living components.
A synthetic genome inserted into an existing cellular environment is not the same achievement as constructing an entire living system from chemistry.
A computational model of a cell is not itself life.
Assessment
Current conclusion: We are assembling increasingly important pieces of cellular life, but the boundary has not yet been crossed in a way that would make the statement “life has been built from scratch” scientifically uncontroversial.
Confidence: Strongly supported.
What would change the assessment: A bottom-up system that sustainably acquires resources, maintains itself, replicates its informational and structural components, divides reliably and supports continuing evolutionary change without borrowing an already living cellular chassis.