Life, not particles, may be physics' next great frontier
September 29, 2026 · 23 min read
Sara Walker says new physics lies in the problems of life and intelligence rather than high-energy physics, Sean Carroll has shifted from guessing new laws to studying how complexity emerges, and Adam Frank calls the question of what life is the biggest question in physics. Three researchers independently pointing to the same frontier suggests where the next big breakthroughs may come from.
The rules, numbers and steps worth keeping in front of you.
- Shared claim: physics' biggest open questions concern life, complexity and information.
- Sara Walker: the frontier is life and intelligence, not higher energy.
- Walker: life is how information structures matter over time and space.
- Walker: living things are huge in time, carrying long histories.
- Assembly theory measures build steps and copy number to detect life's products.
- Sean Carroll: he moved from guessing new laws to explaining how complexity emerges.
- Carroll: complexity rises then falls as disorder grows; life rides that increase.
- Carroll: the study of complexity still lacks a governing framework.
- Adam Frank: the biggest question is what life is, and how agency arises.
- Frank: physics predicts a star's life but not what a cell becomes.
- Frank: the unit of life is the whole biosphere.
- Disagreements: entropy's role, quantum interpretation, physicalism and consciousness.
- The three are overlapping colleagues, so the convergence is not fully independent.
- No settled theory exists yet; particle physics is not finished, and rigor still rules.
This is the short form. The full insight has every expert's reasoning, their own words and the sources.