Experiments show that for random soups in Life in finite plane with moderate initial densities (say 0.25 to 0.5), the resulting ash has a density of about 0.0287. In infinite fields the situation may be different in the long run because of certain rare patterns, like long-living quadratic replicators (if any) that produce a large enough "colony" and survive knocking into ash.
Sparse Life (also called, somewhat confusingly, early universe by John Conway) is the study of the evolution of a soup of vanishingly small density in an infinite universe, and as such a part of cosmology. Such a universe is dominated at an early stage by blocks and blinkers (collectively known as "blonks") in a ratio of about 2:1, with rare structures created by common methuselahs (e.g. R-pentominoes and pi-heptominoes). Much later it will be dominated by simple infinite growth patterns (e.g. block-laying switch engine and glider-producing switch engine). The long-term fate of a sparse Life universe is not certain.
Soup search or soup searching is a method of searching for interesting patterns. It is done by running random soups in a specific rule, followed by counting the results and tabulating them.
Soup search can be implemented into languages like C and Python easily, making it popular. It can also be done manually in Golly, with default key ctrl+5 to randomize a selected region.
- Ethan Wilson (December 28, 2007). "Optimal Broth". Retrieved on June 16, 2009.
- The Online Life-Like CA Soup Search (discussion thread) at the ConwayLife.com forums
- Soup search results (discussion thread) at the ConwayLife.com forums