The internet feels most like an ecosystem, though it borrows fascinating qualities from both cities and libraries. In a city, you follow planned routes—streets, addresses, designated spaces for specific activities. A library organizes knowledge into careful categories with systems for finding exactly what you need. But the internet grows more like a forest or coral reef, where countless small actions create something larger and more complex than anyone designed. **How digital ecosystems emerge** Every website, every link, every search creates tiny changes that ripple outward. When millions of people click, share, and connect, patterns emerge that no single person planned. Popular sites draw more visitors, which draws more links, which draws more visitors—like how successful trees in a forest create conditions that help them grow even taller. Forgotten corners of the internet fade away like abandoned clearings, while new communities spring up around shared interests like organisms finding their niche. The internet even has its own version of natural selection. Websites that serve people well get visited more often. Ideas that resonate get shared and evolve as they spread. Useful tools survive while clunky ones disappear. But unlike biological ecosystems, this one grows at the speed of thought, with new species of apps and platforms appearing almost daily. **The living web** Perhaps most remarkably, the internet exhibits something ecologists call emergence—the whole becomes more than the sum of its parts. No one designed Wikipedia, yet millions of contributions created something unprecedented. No one planned for social movements to organize online, yet digital tools reshaped how humans connect across continents. When you think about explaining the internet to someone else, you might find yourself describing this living quality—how it's not just a tool we use, but a space we inhabit and shape together, where every click is like a footstep on a trail that becomes more visible the more people walk it. Try noticing how your own internet use creates tiny changes in this vast digital ecosystem, leaving traces that help determine what grows and what fades away.