Cities have long been compared to
organisms—Plato talked about the city as a corporeal body, and the urban spaces
we’ve created have come to resemble their creators. Structurally, they follow a
distinctly biological design and obey the same metabolic laws that govern every
organism.
Below the skin and under the street
lie the intestines, the metal intestines that allow suburbs to sprawl and
skyscrapers to rise. The fiber-optic cables are nerves, and the subway tunnels
are thick jugular veins. Energy is distributed, and waste is digested. All this
generates a sort of animal heat, which escapes from the grates in the gutters.
The foul steam is exhaled breath. But how true is this metaphor? Are cities
really like living things?
A team of physicists and economists
led by Geoffrey West of the Santa Fe Institute recently set out to answer these
questions. It turns out that, in many respects, cities act just like creatures.
They obey the same metabolic laws that govern every organism. Their
infrastructure follows a distinctly biological design, which helps explain why
cities are able to grow.
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