# Evoloop > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this node within the history and governance of substrate-independent evolution. **Domain:** Artificial Life / Digital Evolution **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition Evoloops are self-reproducing cellular-automaton loops capable of inherited structural variation and competition for space. ## Nexus Context They constructively demonstrate Darwinian evolution in a deterministic cellular automaton: variants reproduce, interact and undergo differential persistence under spatial constraint. ## Evidence Boundary The demonstration is bounded to the automaton’s rules and ecological possibilities. It establishes evolution, not sentience, moral status or indefinite novelty. ## Relationships [[wiki/Hiroki Sayama|Hiroki Sayama]], [[wiki/Self-Replicating Loop|Self-Replicating Loop]], [[wiki/Competitive Exclusion|Competitive Exclusion]], [[wiki/Deterministic Cellular Automata|Deterministic Cellular Automata]] ## Sources / Provenance - Sayama (1999); Sayama and Nehaniv (2025), DOI 10.1162/artl_a_00451.