# Caltech > **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:** Institution / Science and Engineering **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition The California Institute of Technology is a research university in Pasadena with major roles in physics, computation, biology and aerospace. ## Nexus Context It hosted the 1948 Hixon Symposium where von Neumann presented the automata argument that anchors the article’s prehistory of artificial heredity. ## Evidence Boundary Institutional proximity supplies context, not automatic intellectual causation. Specific claims should remain attached to people, events and records. ## Relationships [[wiki/Hixon Symposium|Hixon Symposium]], [[wiki/John von Neumann|John von Neumann]], [[wiki/Christoph Adami|Christoph Adami]], [[wiki/Artificial Life|Artificial Life]] ## Sources / Provenance - Caltech archives; _Cerebral Mechanisms in Behavior_ (1951).