Mycellial Graph Theory
Albert-Laszlo Barabasi, the man who tried to map the World Wide Web in the late 1990's, commented that the World Wide Web had more in common with "an ecological system than with a Swiss Watch".
Everything is a network: neuroscience, biochemistry, economic systems, disease epidemics, web search engines, machine learning algorithms, astronomy, galaxies, and the structure of the known universe itself.
It's just fractals all the way down and all the way back up.