PeopleofSuperintelligence

Researcher

Nils Aall Barricelli

Nils Aall Barricelli was a mathematical biologist whose early computer experiments modeled self-reproduction and evolution in digital organisms. He studied mathematics and physics under Enrico Fermi in Rome, graduated in 1936, and researched theoretical statistics and mathematical evolution in Norway before joining John von Neumann’s IAS group. His numerical elements reproduced through symbiosis, and Tac Tix experiments tested whether they could improve at a game. He published detailed studies of numerical evolution in 1962 and 1963, held research posts at universities in the United States and Oslo, and returned to Norway as an unsalaried researcher. His 1987 proposal described membrane-like structures and a genetic language for digital organisms; he died in 1993.

Works
61
Citations
709
h-index
11
Badges

Publication numbers from OpenAlex, as of 22 October 2026.

Timeline

  1. 1912–1947

    From Rome to Oslo

    Born in Rome in 1912, he studies mathematics and physics under Enrico Fermi at the University of Rome and graduates in mathematical and physical sciences in 1936. In 1936, he settles in Norway and works on theoretical statistics, stationary time series, and mathematical evolution; by 1947, he is an assistant professor at the University of Oslo.

  2. 1953–1956

    Experiments on the IAS machine

    A mathematical biologist, he joins John von Neumann’s group at the Institute for Advanced Study in Princeton as a visiting researcher in 1953. He runs computer experiments in logical self-reproduction and artificial evolution on the IAS machine, then returns for more work in 1954 and 1956.

  3. 1954

    Symbiosis in numerical evolution

    In 1954, he publishes Esempi numerici di processi di evoluzione. The paper argues that Darwinian selection alone cannot explain the origin of an evolutionary process and describes numerical elements whose reproduction rules require symbiosis.

  4. 1959–1960

    Testing Tac Tix strategies

    At New York University’s A. E. C. Computing Center, he runs experiments on an IBM 704 in 1959 and 1960. In Tac Tix, he uses number sequences from symbioorganisms as game strategies to test whether they can improve at a game.

  5. 1962–1968

    Acta studies and university posts

    His detailed studies appear in Acta Biotheoretica in 1962 and 1963. He works at UCLA and Vanderbilt University; the Vanderbilt post lasts through 1964. He then works in the University of Washington’s Department of Genetics through 1968, followed by a post at the University of Oslo’s Mathematics Institute.

  6. 1972

    A condensed account

    In 1972, he publishes a condensed account of his numerical evolution studies in the Journal of Statistical Computation and Simulation.

  7. 1987

    Membranes and a genetic language

    In 1987, he proposes changes to his numerical-organism design, including membrane-like structures that could help symbioorganisms control their local environment. He describes a genetic language to specify their operational elements and organization.

  8. By 1993

    Returning to Oslo

    He returns to Norway and works for twenty years as an unsalaried researcher at the University of Oslo near the end of his life. He dies in 1993.

Career

  1. 1968–1993University of OsloAssistant Professor, Unsalaried Researcher
  2. 1964–1968University of Washington
  3. 1961–1964Vanderbilt University
  4. 1959–1960New York University
  5. 1953–1956Institute for Advanced StudyVisiting Researcher

Education

  1. 1936Sapienza University of RomeMathematical and physical sciences degree

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. Simulation of biological evolution and machine learning1967 · Journal of Theoretical Biology · 153 citations
  2. Numerical testing of evolution theories1963 · Acta Biotheoretica · 117 citations
  3. A FREQUENCY INVESTIGATION OF ABNORMALLY HIGH TIDAL LEVELS AT CERTAIN WEST COAST PORTS.1963 · Proceedings of the Institution of Civil Engineers · 49 citations
  4. An analytical approach to the problems of phage recombination and reproduction1960 · Virology · 35 citations
  5. A ?chromosomic? recombination theory for multiplicity reactivation in phages1956 · Acta Biotheoretica · 34 citations

From OpenAlex, as of 21 October 2026.

  1. The company share of AI researchers’ top papers was 31% in 2020–2024 and 8% in 1970–1974Includes University of Washington. We estimate where the people shaping AI worked when their most-cited papers appeared: the company share was 31% in 2020–2024 and 8% in 1970–1974, and Google led all organizations in 2020–2024.
  2. The median h-index is 48 at universities and 14 at frontier AI labsIncludes University of Washington. The median h-index is 48 at universities and 14 at frontier AI labs. We compare publishing careers, recent citations, dual appointments and job moves across 2,420 university researchers and 308 frontier-lab researchers.
  3. Of 943 people shaping AI who worked at Google, 446 work there nowIncludes University of Washington. Our estimates of where the 943 people shaping AI who worked at Google and Google DeepMind work now: 446 at Google and 452 across 278 other organizations.
  4. 20% of people at companies who shape AI also hold a university role, led by Google and Stanford UniversityIncludes University of Washington. We estimate that 539 of the 6,766 people with a known current organization (8%) hold both a university role and a company role, including 20% of people at companies and 13% of people at universities.

Colleagues

People named in this biography, and people with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Nils Aall Barricelli yet. Send us a free-licensed photo.

  1. Creative Evolution cabinetmagazine.org. Checked 21 October 2026.
  2. Nils Aall Barricelli en.wikipedia.org. Checked 21 October 2026.
  3. Chapter 5 From Idea to Reality: Designing and Building Self-Reproducing Machines in the Mid-20th Century tim-taylor.com. Checked 21 October 2026.
  4. The Computer Maverick Who Modeled the Evolution of Life lede-v2.nautil.us. Checked 21 October 2026.
  5. Numerical Examples of Evolutionary Processes [English translation of ‘Esempi Numerici di Processi di Evoluzione’ (1954)] tim-taylor.com. Checked 21 October 2026.