"According to NASA's Definition of Life, I'm Not Alive" - Why Nobody Can Define Life | Dr. Kate Adamala

What It Covers

Dr. Kate Adamala, synthetic cell engineer at the University of Minnesota, explains how her lab created "spud cells" — synthetic lipid vesicles containing purified biological molecules capable of genetically encoded feeding and division, representing a milestone toward engineering biology as a general-purpose manufacturing technology for medicine and climate solutions.

Key Questions Answered

• •Synthetic cell architecture: Spud cells consist of purified bacterial proteins and small molecules loaded with DNA plasmids, encased in a lipid vesicle membrane. They feed by expressing surface proteins that recruit nutrient-filled liposomes, and divide via a genetically encoded membrane-curvature protein — the first system demonstrating both processes driven by internal genetic activity rather than external mechanical intervention.
• •Ribogenesis as the critical bottleneck: The single largest unsolved problem in synthetic cell engineering is ribogenesis — assembling functional ribosomes from purified components. All necessary proteins can be expressed, but they fail to self-assemble into active ribosomes unless synthesized and assembled simultaneously in sequence. Solving this would enable spud cells to produce their own translational machinery rather than relying on E. coli-derived ribosomes.
• •Biology as general-purpose manufacturing: The strategic goal is replacing petrochemical production with engineered biology. Spud cells that robustly replicate could serve as scalable bioreactors — secreting therapeutic proteins, novel antibiotics using non-canonical amino acids, or bio-based polymers directly into growth media for purification, eliminating dependence on oil-derived molecules across medicine and materials science.
• •Evolution requires scale, not magic: Spud cells currently require artificially introduced mutations because spontaneous DNA replication errors occur too rarely at lab volumes to observe. At primordial-ocean scale over millions of years, spontaneous mutation and selection would emerge naturally. AI-assisted computational modeling of molecular interactions is being developed to accelerate iteration cycles and simulate evolutionary trajectories.
• •Mirror life research halted globally: A 2024 scientific movement led by Adamala successfully paused all major mirror-life research programs worldwide. Mirror cells — built from opposite-chirality biological molecules — could evade immune systems and environmental predators entirely, making containment impossible. The primary safety barrier remains the absence of any viable source for mirror-chirality ribosomes at usable quantities.