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 R-pentminoes and pi-heptominoes. Much later it will be dominated by simple infinite growth patterns. The long-term fate of a sparse Life universe is not certain.
- Ethan Wilson (December 28, 2007). "Optimal Broth". Retrieved on June 16, 2009.