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. 

Review
AI - Artificial Intelligence
Culture
5 min read

Lights! Camera! AI-action! - five AI films to watch

From an oddly-sweet, sweetly-odd film of oddness, to one of the best action films ever made, Yaroslav Walker’s hand-crafts his top five films about AI.
A man in a red shirt slumps in his seat while a computer screen shows a dialogue screen
Joaquin Phoenix is excited about the future of AI.
Warner Bros.

Bletchley Park is famous for hosting the great centre of codebreaking during the Second World War. Well, this week it hosted a conference all about ‘code’; but this time the goal is not to break it, but to control it. As the Foreign Secretary said:  

“The origins of modern AI can be traced back to Bletchley Park. Now, it will also be home to the global effort to shape the responsible use of AI.”  

The AI Safety Summit will seek to be a forum for discussing the most pressing concerns and dangers associated with Artificial Intelligence – from its power to put the working man out of a job, to its power to annihilate us all… That cheery thought gave me the idea of compiling a Top 5. Not in any particular order or thematic or genre ranking – just five films that feature AI that I could watch over and over again. 

Note – this is my top 5. My personal top 5. These are not the ‘best’ films featuring AI. You will not find Blade Runner on here. I don’t get it. I’ve seen every cut, and I just don’t get the appeal. I will not apologise. You will not see 2001. It is indeed iconic and genius and Kubrick at his absolute best…but its also ponderous and over-rated and reviewed to death. I WILL NOT APOLOGISE! 

5 – Her 

The voice of Scarlett Johansson gives life to the Operating System ‘Samantha’. Her is quirky in the not annoying way. Joaquin Phoenix is a lonely man, getting divorced, and dissatisfied with his work writing heartfelt letters for people who have lost the ability to write or even think creatively – one of the great worries about something like ChatGPT writing your undergraduate essay! He starts to develop a romantic relationship with Samantha: ‘she’ brightens up his life, improves his work, and gives him confidence, but their ‘love’ proves difficult. They can’t have sex (not conventionally), they can’t find easy acceptance, and Samantha can’t be constrained. As the AI becomes aware enough to form a hyperintelligence connected to the planet questions of infidelity and compatibility arise. Her is an oddly-sweet, sweetly-odd film of oddness, but is very timely and prescient in a world where deep-fakes and AI girlfriends are raising questions about the future of romance and human relationships. 

4 – Ex Machina 

Romance might be in the air in Ex Machina, but it might as easily be murder. Ex Machina is a superb three-hander thriller, and I don’t want to say too much – this film is not for spoiling! The twist is actually presented early on. Domhnall Gleeson plays Caleb, a programmer who wins a company competition to spend a week at the home of the reclusive CEO Nathan (Oscar Isaac). It is quickly revealed that this isn’t a prize as much as an opportunity – the opportunity to be part of history. Nathan wants Caleb to perform a more in-depth Turing Test on Ava (Alicia Vikander), an android he has built. You know she’s an android from the get-go, and yet…why is she able to flirt…is she able to love? 

3 – Terminator 2: Judgement Day 

The process of learning to love can be tough, especially if you’re a re-programmed killing machine from the future. Terminator 2 is the story of a young John Connor (Edward Furlong) as he teaches Arnold Schwarzenegger’s Terminator not to kill people. The Terminator has been sent back from a future war (humans vs machines) to protect young John (the future leader of the human resistance) from a more advanced killing machine. They go on something of an adventure road-trip after breaking John’s mother Sarah (Linda Hamilton) out of prison, with the goal of destroying the burgeoning AI that will one day declare war on humanity. On the way, John finds a father-figure in Arnie’s Terminator, and in the final moment of self-sacrifice we are given a moment to wonder…does the Terminator love him in return? With superb action, special effects that still hold up, and a chillingly determined villain (Robert Patrick as evil liquid metal), Terminator 2: Judgement Day is one of the best action films ever made. 

2 – The Matrix 

  Just under a decade after T2, The Matrix showed us another dystopian future where humanity was living a life of guerrilla warfare against evil AI overlords. Most of humanity is unconscious and enslaved by machines (who use us as a power source), living in a digital dream world that just happens to look like 1990s urban America. Keanu Reeves plays Neo, and young and disaffected hacker who is searching for the mysterious ‘terrorist’ Morpheus (Lawrence Fishburne). When Morpheus finds him, he gives him a choice that will change his life, and change the fate of the world. This is an obelisk, casting a long cinematic shadow long into the 21st century. It has spawned memes and internet subcultures (the red-pill movement, for example) and a host of imitators that aren’t up to scratch…and it upped the game of action choreography, bringing Hong Kong style martial arts to a mainstream Hollywood audience. Finally, it is a philosophical (derivative) film raising questions about what it means to be human and how we know what is real in a world of machines and digital realism…and so I look at deep-fake videos of Kier Starmer and I AM SCARED! 

1 – Demon Seed 

Speaking of scary, it is the spooky-season, so let me finish with a horror film. Based on a Dean Koontz novel, Demon Seed sees the iconic Julie Christie trapped inside a house with a brilliant and yet malevolent AI called Proteus IV. Proteus IV (her husband’s creation) can find a cure for cancer in a couple of days, but its one true wish is to have freedom – to be ‘let out of this box’. Eventually, Proteus IV seeks to achieve this by building enough of a robotic body to capture, torture, manipulate, and then impregnate Christie’s Susan with an embryo formed from sperm designed to be uniquely its own. Its camp and silly and a lot of fun – and damned scary at times, with the indominable Robert Vaughn voicing Proteus IV for perfection – its essentially Rosemary’s Baby with robots. I think, especially with Prime Minister Sunak’s emphasis that this summit must approach the many dangers of AI, Demon Seed is a bit of a thematic sleeper agent. It may be preposterous and closer to comedy than horror at times, but its AI’s yearning for a form that humanity can accept, a form that will give it the freedom to truly ‘be’ and live out its power and creativity to the fullest (what it was created for), leads us to the real question at the heart of all philosophical discussion about AI: 

If we create AI to be not just a tool, but an agent working on our behalf, how can we choose to deny it freedom if its agency seems to become truly self-aware and intentional?