Article
Culture
Psychology
Weirdness
5 min read

Why smell jumps the queue when it comes to memories

Smells hardwire deep into the brain, writes Henna Cundill, as she explores why they jump-start such vivid memories.
An autumnal scene of a church yard and church framed by leafless trees.
'The smell of dust and damp stone will always cry “safety!”'
Jakub Pabis on Unsplash.

When I was a 22-year-old undergraduate my mother died quite suddenly. I can't remember the name of the undertakers we used, nor the chaplain who took her funeral. I can no longer visualise what any of their faces looked like. I know I visited the chaplain’s house to plan the funeral, but I can't remember exactly where that house was. What sticks is that the day of the funeral was a sultry summer's day, and both the chaplain and the undertakers smelt of perspiration. To this day there are moments where I catch that same whiff of man-sweat in some other location, and for a fleeting second, I am a bewildered 22-year-old once more. 

Here is another memory. I attended a tiny, rural Church of England primary school in the middle of England. At the end of each school year, all of us donned our little Wellington boots, which smelt faintly of slurry (since this was dairy-farming country) and sweaty feet. Then we lined up in a crocodile and trudged through the bluebell-wood (damp leaves) and skirted the edge of fields (silage, which stings the nose) covering the mile or so between our school building and the village church. 

We would enter the church grounds through the back field, hurrying through an eerily muffled graveyard with tombstones towering far above our heads and the grass disturbingly lumpy beneath our little feet. To the chidings of “Quickly!” and “Quietly!” we children scurried down a gravel path, away from this unsettling place of death, to reach the cool sanctuary of a little church, and the comforting smells (for me, at least) of damp stone and dusty hymnbooks. 

Others may not have the same associations, but for me the smell of dust and damp stone will always cry “safety!” and the reassurance that “there are no ghosts in here!” in contrast to that troubling graveyard. From death to life. Yet, at the same time, getting stuck with my nose close to some man’s whiffy armpit on the Tube will forever insinuate that I am just a child pretending to be a grown-up, out of my depth, overwhelmed with one thousand decisions to make (“What flowers do you want for her coffin?”) and no-one to advise. In the midst of life, death again.  

On reflection I will know that my emotions are being manipulated by my nose, in ways which are more or less than helpful depending on the circumstances.

Of course, I am not 22 years old and lost anymore, no matter what that man’s armpit tries to tell me. My rational mind knows better, but my rational mind doesn’t get a say – or doesn’t get the first say anyway. This is because smell is the only one of our senses that bypasses the thalamus (the brain’s ‘filtering gate’ that decides which part of the brain needs to respond to sensory input) and goes straight to the limbic system, where emotional memory is stored.  

Sometimes it is very obvious that this is taking place, such as in the examples given above. On reflection I will know that my emotions are being manipulated by my nose, in ways which are more or less than helpful depending on the circumstances. But it can happen in more subtle ways too. Supermarkets infamously pump out smells to influence our buying choices, and we’re trying to sell our house right now, so we’ve been brewing a whole lot more coffee than we ever usually would.   

Intriguingly, scientists don’t really know why the human sense of smell jumps the queue when it comes to cognitive processing. There are biological theories, such as that the smell of predator could wake up our ancestors while they were sleeping and/or could allow them to follow a scent trail quickly when fleeing danger or seeking food. There are social theories too, such as that we don’t have a lot of good words to describe smells, so the brain just doesn’t bother trying to analyse them. Whatever the truth of the matter, the reality is that (whether we like it or not) our noses are an emotional trip-hazard.  

When I walk through those great oak doors there is a moment, a glitch in the matrix, when the unmistakable smell of church hits my nose. Dust, damp… a little hint of mouse. 

I can’t help wondering what this tells me about my religious practice. Do I go to church because I have made a cognitive decision to worship God each Sunday? Or do I go to church because I am following my nose, getting away from a world full of armpits and responsibilities to a place where I am a seven-year-old girl, all gingham dress and wellies, feeling safe. If so, does it matter?    

Truth is, my mind can give me a dozen reasons not to go to church every single week. In fact, two dozen reasons. More. It has always been a busy week; I’m always behind on work. The house always needs a sort out and the car is never washed. But because certain congregation members are normally counting on me for certain things, and because I’m still pretending to be a grown up, I typically drag myself out the door, and off to church I go.  

And week on week, without fail, when I walk through those great oak doors there is a moment, a glitch in the matrix, when the unmistakable smell of church hits my nose. Dust, damp… a little hint of mouse. My body registers this before my mind; my shoulders drop a little of their tension. Even if it’s just for a fleeting moment, I start to feel that I know for sure what is absolutely real in my life and what is just pretend.  

Is this knowledge irrational – since it doesn’t come from the cognitive part of my mind? Or is there a God who knows that the cognitive part of my mind sometimes tells me all sorts of untrue and unhelpful things. Is there a God who is choosing to reach out to me in more subtle, more ancient ways?  

I can only wonder if I have been following my nose all this time, without even noticing. Drawn along by an ancient scent trail that leads me time and time again…this way…and that way…until I reach a place where there is safety, and bread. 

Snippet
AI
Culture
Digital
Sustainability
3 min read

AI Barbie: does anyone think about destruction?

We choose waste and consumption over stewardship.

Jean is a consultant working with financial and Christian organisations. She also writes and broadcasts.

An AI generated image of a Barbie-like Toy
AIn a Barbie world.

If you spend any time on any social media platform you would have probably seen the ChatGPT Barbie trend. Resembling packaged toys, the AI depicts you like a doll or action figure. At first, I thought I was only seeing it because of the LinkedIn algorithm. But then I started to see articles in my feed from mainstream media outlets teaching people how to do it.  

Generally, speaking, I am not a trend follower. I am one of those annoying people who doesn’t get involved with what everyone is doing just because everyone is doing it. Thankfully, I don’t suffer from FOMO (the Fear Of Missing Out) and I don’t think I am swayed much by peer pressure. But I like to stay informed about what is going on. So I can have something to talk about when I meet people in new settings and to remain relevant. So, when this started popping up in my feeds, I investigated it, and I was pleasantly surprised. 

I am not anti-AI. I have embraced and seen the benefits of AI in my own life (this sounds a bit weird, but I think you get my point). I understand and accept that it will, can and has improved productivity and creativity. I use ChatGPT all the time for social media content and captions, brainstorming, titles for articles, coding problems, research and language translations.  

But like many, I have long been sceptical about the growth of AI use and the viability of its long-term sustainability. I wouldn’t describe myself as a climate warrior, but I do believe that we have a responsibility to ourselves and the generations after us to use the finite resources of the planet frugally. The AI-powered Barbie trend throws that out of the window.  

The current Trump administration has facilitated a shift away from ESG (environmental, social and governance) targets in the world of business. For the most part, the criticism of this in the media (social and mainstream) has been focused on DEI targets. But perhaps, in the face of slow economic growth and because this began before the Trump administration took office, the move away from environmental targets or what I would call environmental stewardship, or frugality has received limited coverage.   

I have never understood why proponents of the climate emergency, have made themselves bedfellows and in some cases, wholehearted supporters of the AI revolution. A typical data centre uses between 11-19 million litres per day water just to cool its servers, that’s the equivalent of a small town of 30,000-50,000 people. The International Energy Agency (IEA) predicts by 2030 that there will be a doubling of electricity demand from data centres globally equating to slightly more than the entire electricity consumption of Japan. This growth will be driven by the use of AI in the US, China, and Europe. That’s why vocal support of the climate emergency and advocating escalated transition to AI, as is the position of the UK government, currently seems paradoxical to me.  

This isn’t hyperbole, Sam Altman, CEO of Open AI recently tweeted asking folks to reduce their use of the ChatGPT’s image generator because Open AI’s servers were overheating.  

That is why I have been pleasantly surprised, by some of coverage on the Barbie trend. Arguments are now being made more loudly about the true cost of unlimited AI expansion.  

I am not against progress or AI expansion entirely, and I have some support for the argument that governments have pursued net zero policies at a rate that is impractical, expensive and unviable for the average consumer in Western democracies. However, the Barbie trend reveals our tendency to choose waste and consumption for fleeting pleasure. For many of us, we have probably just thought, ‘It’s just a bit of harmless fun’. But the truth is it isn’t, it’s just that we can’t see the damage we are doing to the environment. That’s without going into the financial and privacy costs associated with the AI revolution. It really is a case of that age old adage, ‘Out of sight, out of mind’.  

The challenge is now that we know, what do we do? Do we continue to be part of wasteful AI trends? Or do we use AI to add value, increase productivity and solve problems?  

Celebrate our 2nd birthday!

Since Spring 2023, our readers have enjoyed over 1,000 articles. All for free. 
This is made possible through the generosity of our amazing community of supporters.

If you enjoy Seen & Unseen, would you consider making a gift towards our work?

Do so by joining Behind The Seen. Alongside other benefits, you’ll receive an extra fortnightly email from me sharing my reading and reflections on the ideas that are shaping our times.

Graham Tomlin
Editor-in-Chief