Cities, like bodies, grow and evolve. In the case of New York City, that growth never would have occurred if not for a Homeric engineering feat that occurred mostly underground. Jad digs into the history of the city's water tunnels with Diane Galusha and Nik Sokol. And Sandhogs Ritchie Fitzsimmons ...
One tidy mathematical formula may hold the key to how cities work. This hour, Radiolab takes to the streets to test the numbers...and ask what really makes cities tick.
