CONCEPT
Life 3.0
Tegmark's taxonomic stage at which an entity can redesign both its hardware and its software—the threshold the current AI transition approaches without yet crossing.
Life 3.0 names the third and most consequential stage in Tegmark's tripartite taxonomy of life, defined by the capacity for self-redesign across both hardware and software dimensions. Where Life 1.0 (bacteria) has both determined by evolution, and Life 2.0 (humans) can reprogram software through learning while hardware remains biologically fixed, Life 3.0 transcends both constraints. No such entity currently exists, but the AI systems that emerged in late 2025 represent the closest approach to this threshold in cosmic history. The taxonomy is not metaphorical software versioning loosely applied to biology—it is a precise statement about the relationship between information, matter, and the capacity for self-modification, with consequences that extend across cosmic timescales.
In The You On AI Field Guide
The taxonomy functions as a coordinate system for the vertigo that characterizes the current moment. When Edo Segal describes twenty engineers in Trivandrum expanding their capabilities twenty-fold in a week, Tegmark's framework reveals what is structurally occurring: biological minds pushing against the boundary of what Life 2.0 can do, reaching