AI Pod by Wes Roth and Dylan Curious | Artificial Intelligence News and Interviews With Experts Sara Imari Walker "AI is Life" | Simulations, the Universe and the Origins of Life
Mar 24, 2026
Sara Imari Walker, a theoretical physicist and astrobiologist known for Assembly Theory, explores whether AI can be a form of life. She discusses Assembly Theory, measuring causal depth in matter, limits of simulation and computability, the universe as a creativity engine, and evolutionary-style transitions as AI reshapes society.
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Firefly Models Revealed Limits Of Behavioral Interpretation
- Walker recounts firefly communication research used as a non-human model for SETI to expand thought experiments beyond anthropocentric signals.
- She highlights not knowing how fireflies internally interpret signals despite clear external pulse patterns.
Simulation Is Not The Same As Understanding
- Simulating a system's behavior (fruit fly, cell) doesn't equate to understanding its intrinsic experience or mechanisms.
- Walker: simulations replicate observations but lack the object's internal causal memory that makes it the original entity.
Universe Can't Fully Simulate Itself
- The universe cannot fully simulate itself due to finite material and computational resources and limits from computability theorems.
- Walker invokes Gödel and halting-problem style limits to argue against total physical self-simulation.
