Networks of networks are all around you — and you are one

Unless you’re totally disconnected from the world around you, you’ve noticed by now that everything in the world around you is connected — in a network.

It’s not like the old days, when the “networks” were designated by acronyms for companies producing TV shows. Networks are more diverse now, consisting of any system of nodes connected by links: Web pages and hyperlinks, electric power plants and transmission lines, actors in movies with Kevin Bacon.