So slime mold, which is a fungus-like single-celled organism, has a tendency to build highly optimized networks across its food sources. In other words, if you scattered a bunch of food on a surface and then dropped in some slime mold, it would naturally create an interconnected web of linked veins across this surface. And this web would be based on the shortest and most efficient paths of travel between the various food sources.
I am mentioning this odd factoid because ten years ago researchers in Tokyo used this naturally occurring phenomenon for the purposes of trying to improve transportation planning. What they did was map out greater Tokyo. They then placed oat flakes (i.e. food) in spots that correspond to the various cities and urban centers that surround the city. Alongside this, they blocked off the areas where transportation networks do not typically run, such as through mountains and into the water. They then dropped in some slime mold, wet the surface, and watched it grow.

What they found was that the resulting network was remarkably similar to Tokyo's actual rail network. The slime mold had found the most efficient routes, eliminated redundancies, and generally discovered the optimal way in which to connect its food sources. And if you think about it, this is basically what transit networks are supposed to do. They should connect clusters of people in the most efficient way possible.
It has been a decade since this slime mold transportation discovery was first publicized, and it would seem that it hasn't really caught on as an invaluable planning tool. So I'm going to go out on a limb and suggest that we should take out a map of every major city in the world, plot its population centers, drop down some oat flakes, and then let slime mold tell us all the ways in which we are screwing up and over-politicizing our transportation planning efforts.
Thank you to Angus Knowles for making me aware of this study. Angus writes an occasional newsletter about cities and housing, over here.
Image: LiveScience

I just discovered this set of maps (via Brian Potter) looking at the largest cities in the world from 100 CE all the way through to today (well 2015 CE). Here are what the two bookends of this map series look like:


I tweeted this out last night:
https://twitter.com/donnelly_b/status/1473880198256934918?s=20
blogTO then picked it up and it got quite a bit of engagement.
Some people, okay a lot of people, used it as an opportunity to be tongue in cheek and respond with things like: cheaply built condos, boarded up Starbuckses, Hooker Harvey's, Drake's house in the Bridle Path, the crumbling Gardiner Expressway, and that McDonald's at the northwest corner of Queen and Spadina (this one is no longer a contender for me now that they've gotten rid of their walk-up window).
Of course, there were also a lot of the usual suspects: The Sky Dome, The Gooderham Building (our miniature Flatiron Building), Casa Loma, The Royal Ontario Museum (specifically the expansion by Studio Libeskind), "New City Hall", The Royal York Hotel, Honest Ed's, The St. Lawrence Market, Robarts Library (University of Toronto), and a bunch of others that you might find displayed on the seat screen on your next Air Canada flight.
But I'd like to unpack the initial question a bit more. Because what does it really mean for something to be a symbol of a city? And is there an important distinction between the symbols that resonate with locals on a personal level and the symbols that get exported around the world as a city's brand and identity? Indeed, one of the criteria in most global city rankings is a prominent and recognizable skyline. Icons are important.
Let's consider an example. I agree entirely with Sean Marshall that "New City Hall" is a deeply symbolic building. Built in the early 1960s after decades of work, New City Hall was the outcome of an international design competition. And it was decidedly modern at a time when Toronto really wasn't that modern. Montréal was the biggest and most global city in the country and multiculturalism hadn't yet become a federal mandate. And so New City Hall symbolized our genuine ambitions to becoming something more.
But does the rest of the world care? If you were to ask somebody my question on the streets of Rio de Janeiro or Tokyo, what would they say? What would they remember? The thing about most tall buildings or other city symbols is that they become abstractions. They turn into pictures on social media -- like logos of a company. But maybe that's all we can reasonably ask of the world. Maybe all that really matters is that a symbol has local significance; it's then up to us to export it and tell that story to the rest of the world.
So slime mold, which is a fungus-like single-celled organism, has a tendency to build highly optimized networks across its food sources. In other words, if you scattered a bunch of food on a surface and then dropped in some slime mold, it would naturally create an interconnected web of linked veins across this surface. And this web would be based on the shortest and most efficient paths of travel between the various food sources.
I am mentioning this odd factoid because ten years ago researchers in Tokyo used this naturally occurring phenomenon for the purposes of trying to improve transportation planning. What they did was map out greater Tokyo. They then placed oat flakes (i.e. food) in spots that correspond to the various cities and urban centers that surround the city. Alongside this, they blocked off the areas where transportation networks do not typically run, such as through mountains and into the water. They then dropped in some slime mold, wet the surface, and watched it grow.

What they found was that the resulting network was remarkably similar to Tokyo's actual rail network. The slime mold had found the most efficient routes, eliminated redundancies, and generally discovered the optimal way in which to connect its food sources. And if you think about it, this is basically what transit networks are supposed to do. They should connect clusters of people in the most efficient way possible.
It has been a decade since this slime mold transportation discovery was first publicized, and it would seem that it hasn't really caught on as an invaluable planning tool. So I'm going to go out on a limb and suggest that we should take out a map of every major city in the world, plot its population centers, drop down some oat flakes, and then let slime mold tell us all the ways in which we are screwing up and over-politicizing our transportation planning efforts.
Thank you to Angus Knowles for making me aware of this study. Angus writes an occasional newsletter about cities and housing, over here.
Image: LiveScience

I just discovered this set of maps (via Brian Potter) looking at the largest cities in the world from 100 CE all the way through to today (well 2015 CE). Here are what the two bookends of this map series look like:


I tweeted this out last night:
https://twitter.com/donnelly_b/status/1473880198256934918?s=20
blogTO then picked it up and it got quite a bit of engagement.
Some people, okay a lot of people, used it as an opportunity to be tongue in cheek and respond with things like: cheaply built condos, boarded up Starbuckses, Hooker Harvey's, Drake's house in the Bridle Path, the crumbling Gardiner Expressway, and that McDonald's at the northwest corner of Queen and Spadina (this one is no longer a contender for me now that they've gotten rid of their walk-up window).
Of course, there were also a lot of the usual suspects: The Sky Dome, The Gooderham Building (our miniature Flatiron Building), Casa Loma, The Royal Ontario Museum (specifically the expansion by Studio Libeskind), "New City Hall", The Royal York Hotel, Honest Ed's, The St. Lawrence Market, Robarts Library (University of Toronto), and a bunch of others that you might find displayed on the seat screen on your next Air Canada flight.
But I'd like to unpack the initial question a bit more. Because what does it really mean for something to be a symbol of a city? And is there an important distinction between the symbols that resonate with locals on a personal level and the symbols that get exported around the world as a city's brand and identity? Indeed, one of the criteria in most global city rankings is a prominent and recognizable skyline. Icons are important.
Let's consider an example. I agree entirely with Sean Marshall that "New City Hall" is a deeply symbolic building. Built in the early 1960s after decades of work, New City Hall was the outcome of an international design competition. And it was decidedly modern at a time when Toronto really wasn't that modern. Montréal was the biggest and most global city in the country and multiculturalism hadn't yet become a federal mandate. And so New City Hall symbolized our genuine ambitions to becoming something more.
But does the rest of the world care? If you were to ask somebody my question on the streets of Rio de Janeiro or Tokyo, what would they say? What would they remember? The thing about most tall buildings or other city symbols is that they become abstractions. They turn into pictures on social media -- like logos of a company. But maybe that's all we can reasonably ask of the world. Maybe all that really matters is that a symbol has local significance; it's then up to us to export it and tell that story to the rest of the world.
It is an interesting reminder of just how centralized the world was around the Mediterranean and parts of Asia, and also how nothing is guaranteed. As recent as 1900, cities like Manchester and Philadelphia were among the top 10 largest cities. Today they aren't even close.
For the full map collection, click here.
UPDATE: The data behind these maps has been called into question. Look out for a follow-up post.
It is an interesting reminder of just how centralized the world was around the Mediterranean and parts of Asia, and also how nothing is guaranteed. As recent as 1900, cities like Manchester and Philadelphia were among the top 10 largest cities. Today they aren't even close.
For the full map collection, click here.
UPDATE: The data behind these maps has been called into question. Look out for a follow-up post.
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