How Rats Built an Underground Empire in Cities Beneath the streets of modern cities lies a hidden world that most people never see—but it is always active. In places like London, an entire ecosystem thrives underground, shaped largely by one of the most adaptable mammals on Earth: the Brown rat. Far from being random pests, rats have effectively created an “underground empire” built on survival, intelligence, and perfect adaptation to human environments. The rise of the urban rat The Brown rat originally evolved in parts of Asia but spread globally alongside human trade routes. As cities expanded, rats discovered something extraordinary: an environment that provides everything they need to survive. Urban areas offer: • Constant food waste • Warm, sheltered underground spaces • Few natural predators • Complex ready-made tunnel systems (sewers, basements, rail networks) Over time, rats didn’t just survive in cities—they've actually mastered them. The underground network Modern...
An Intimate Guide to British Wildlife