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. 

Podcast
Culture
S&U interviews
3 min read

My conversation with... Jennifer Wiseman

Re-enchanting podcast guest Jennifer Wiseman shared an infectious wonder at the universe. Podcast co-host Belle Tindall reflects on their conversation.

Belle is the staff writer at Seen & Unseen and co-host of its Re-enchanting podcast.

Four stars scintilate above a spiral galaxy viewed from the side.
Hubble Space Telescope captures a side-on view of NGC 3568, a barred spiral galaxy roughly 57 million light-years from the Milky Way.
European Space Agency, CC BY 2.0, via Wikimedia Commons.

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The details of astronomy, the workings of astrophysics, the enormity of space, the fact that the universe is still expanding by the moment, the mystery of what lies beyond what we can see and even predict – those are things that do not sit comfortably in the confines of my brain.  

It’s as if my brain is allergic to the sheer enormity of the subject. My mind does deep, it does not take lightly to vast.  

And that is precisely why I so thoroughly enjoyed my conversation with astronomer, author and speaker, Dr Jennifer Wiseman for the Re-Enchanting podcast. Jennifer is Director Emeritus of the programme of Dialogue on Science, Ethics and Religion for the American Association for the Advancement of Science. She is also a senior astrophysicist at the NASA Goddard Space Flight Centre. Science is a means by which Jennifer is able to live a wonderfully curious life, marvelling at the natural world and what lies beyond it.  

When the narrative of science and religion being ultimately and inevitably at war with each other is the narrative that gets (by far) the most amplification, it was really interesting to hear how they coincide so powerfully for Jennifer. When talking with her, it becomes clear that they co-exist, they are the symbiotic forces that fuel her wonder at the universe. A wonder that is undeniably infectious. As she pointed out, the very fact that we have a curiosity about the universe we find ourselves in is, in itself, something to marvel at. 

‘We are here, we’ve come through this 13.8 billion year development of the universe to the point where we can have this self-contemplating life that recognises a bit of where we’ve come from and how we connect to the universe.’ 

These are surely the thoughts that existential crises are made of.  

Speaking with Jennifer made me feel small. Small in time, and small in place. I suppose dwelling on the enormity of an ever-expanding universe will do that to a person. Afterall, there are around one hundred billion stars in our galaxy (that we know of), the closest of which is four lightyears away. The vast majority of these stars have their own solar systems, hosting their own planets that orbit around them. And that’s still only within the confines of our own cosmic neighbourhood; there are hundreds of billions of galaxies in our (observable) universe, and infinite mystery that sits far beyond these numbers.  

Since our conversation, I’ve been left with this simple, but salient thought – we’re incredibly small. But further to that, I’ve been pondering the notion that there’s a good kind of small, and perhaps we are it. We may be just one of the eight-billion inhabitants of a ‘pale blue dot’ in a universe that stretches far beyond the capacities of human understanding and measurement, but there’s a profound beauty in that. It does not equate to a feeling of non-consequentialism or oblivion, on the contrary, it is deeply empowering. It is, after all, the powerful reality upon which much of the twelve steps of recovery offered by AA/NA is built. There is a mysterious, and yet obviously tangible, power in coming face-to-face with our own small-ness, and surrendering to that which is deeper, higher, bigger than us.   

Learning a little about Jennifer’s childhood living among the Ozark Mountains, with evenings spent gazing up at a canopy of stars that stretched from ‘horizon to horizon’, it was enchanting to hear about how her career has been an out-living of a childhood appreciation for the things that are so much bigger than us mere humans.  

If you have a pull towards all things astronomy, this episode is undoubtedly for you. If you’ve ever pondered what science and faith look like when they’re not entering the ring from different corners, readying themselves for a show-down, this episode is also for you. If you’re craving enchantment of the most cosmic kind, this episode is for you too.  

This conversation with Dr Jennifer Wiseman will be a refreshing antidote to the disillusion that comes with assuming we are the centre of our universe.