Explosive percolation (https://science.sciencemag.org/content/323/5920/1453) is a recent concept where random networks R0 (basic reproductive number) is reached abruptly. When R0 crosses 1.0 there is complete connectivity (a network of nodes and links are completely connected; #nodes = #links makes R0 =1 because R0 = #nodes/#links). This 1912 paper https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3320609/ shows the first evidence of mathematical modeling… Read more »