Out Now | Pre-Fall 2026 Collection Shop Now
Gemma Janes: Josh, can you introduce me to your research?
Joshua Williamson: Cosmology is a branch of astrophysics that focuses on larger scales. We ask questions about our universe, what it's made of, how it began, where it's going. My research focuses on what we can't see. We call it the Dark Universe, mainly made up of dark energy and dark matter, two peculiar things that we don't know much about.
Gemma Janes: Do you think there's a relationship between gardening and cosmology? Both seem to be ways of observing change over vast periods of time, albeit at very different scales.
Joshua Williamson: Well, like a garden, our universe is growing and evolving all the time. There are galaxies forming all the time. Galaxies that merge together. Black holes form, black holes die, and structures in the universe become more dense. The main research topic that I contend with is this mysterious growth we call dark energy and why it is expanding.
Gemma Janes: They call it a mysterious growth?
Joshua Williamson: Yes.
Gemma Janes: Why mysterious growth?
Joshua Williamson: Because dark energy is this very mysterious thing. We discovered it in the 1990s. Before that, our standard model began with the Big Bang, an explosion where everything in the universe came from an infinitesimal point. It threw everything in the universe out, which is why we thought the universe was expanding. This model showed that the expansion would be slowing because all that's left in the universe is matter with gravity. It would be natural that the explosion would slow down over time, then eventually collapse back in on itself. However, that's not what we're seeing; we discovered that the universe's expansion isn't slowing down at all. It's accelerating. We've coined this mysterious force that is expanding the universe: dark energy. It's very abstract and very mysterious. A vacuum energy that occupies all of space. We don't know what it is. We don't know what causes it. There's nothing in our standard model of physics that can possibly explain it. We don't know why it's growing. Some of my work attempts to test mechanisms that can go one step deeper and, at least, lessen the abstraction.
Gemma Janes: We peer out of our telescopes and into our own cosmic back garden?
Joshua Williamson: Light is very, very slow in our universe, so the further we look back into the sky, the further we're looking back in time. Our nearest star is about four light-years away, so you're looking at something that is four years old. But as you look further and further back into the sky, you're actually looking further and further back in time. Every second there is new light travelling to us from our cosmic neighbourhood. So our observable universe, our cosmic back garden, is always growing. We get to see more and more of it every day.
Gemma Janes: Does it have anything in common with how we can look into a fallen tree and count the rings to assess its age?
Joshua Williamson: You can count the age of the trees in your garden, but it's different. By looking backwards in time, we can see the evolution of the universe. It has a history. You can see what it's done from its birth up to the current day.
Gemma Janes: Do you think gardening is, in some sense, an attempt to create order within a world that naturally tends towards disorder?
Joshua Williamson: It is kind of interesting talking about time and gardens, and it falls neatly into this argument about entropy. One of the ways that you can measure time in the universe is entropy. Our universe is going from order to disorder.
Gemma Janes: In Ovid's Metamorphoses, completed around the same time as the topiary tradition was first recorded, the opening chapters recount the ordering of cosmic chaos from a vast primordial soup.
Joshua Williamson: Physics actually tells a rather different story. Everything in the natural world tends towards disorder. To be a gardener is to reverse entropy. But the universe is a garden on an unstoppable journey.
Gemma Janes: Isn't science really just trying to find some order in there?
Joshua Williamson: It's about explaining it. It's like an ancient woodland, a garden that you can't touch. It doesn't need a gardener. It's going to do its own thing no matter what. It's an amazingly fantastic infinite forest that can't possibly be touched by humans. It has actually been very freeing for me to know that this is something that's completely beyond our control.
Gemma Janes: And that feeling of wanting to understand something so impossibly vast is what makes something sublime?
Joshua Williamson: Gardening is sublime. Working with wood and plants and things that grow, it's an unbelievable privilege. As far as we know, there is no other place in the universe that can hold that kind of life. Cosmology could be a metaphor for topiary gardening where you've got hundreds, if not thousands, of gardeners, or scientists, all trying to tend to the same garden. And when there are a lot of gardeners tending to the same garden, there can be a lot of disagreements. For example, we've got this one shrub called the Hubble Constant, which asks how fast the universe is expanding. And they can't agree on it. If you ask one gardener, they think it should be one way; another gardener, it should be the other way. You can try to convince the rest that your way is the best, bring your evidence to the gardener conference, but you'll continue to disagree. It ends up descending into almost different factions of a religion, until you undergo some type of revolution where you get an Einstein gardener who discovers something that convinces all the others that it's the right way.
Gemma Janes: But in the end, you're always adhering to the same garden and the rules that were set in place from the beginning.
Joshua Williamson: It's true. In some way, the boundaries of the garden are the metaphor for science. We are very hemmed in by rules that have been set up a very, very long time ago.
Gemma Janes: We're currently in a moment of rapid acceleration in terms of science and technology. I'd like to consider the concept of Kontinuum, that which continues on its own time, indifferent to the pace surrounding it. Has studying the universe changed the way you think about time and continuity?
Joshua Williamson: I suppose there are things that we give a lot of value to on our planet. Diamonds, for example. We develop machinery that helps us mine with more speed and precision, but diamonds actually ubiquitous in our universe. We encase them in silver and enshrine them as if they’re the most precious thing of all. Plants and wood—they are truly rare. And they are continuously growing, in communication with us all the time.
Gemma Janes: There is a wonderful philosopher called Emanuele Coccia. He wrote a book called The Life of Plants, which considers that we are absolutely one with plants at all moments, that they consider us, they take us in, and they breathe us out too. It is a constant communication. In a way, this awe can be found on a minute level when observing plant life, in the same way that we observe our universe, which is on a rotation journey and expansion that gives us the seasons, the night, and the day.
Joshua Williamson: Even if we never reach a place of comprehension, it's not going to stop people from observing. Cosmology might be the most humbling science because you can only watch. It's the one garden you can look at, but you can’t touch. So yes, it is humbling to work with nature, in the same way that it feels to observe our universe. We can try to tame it, to look at it from a new angle, but it continues to grow outside of our control. I think that becomes an endless fascination for some, a continuous joy and a place to always return, one that will far outlive our end.
Please enter the email address associated with your account. You will receive an email with the link to reset your password.
Need help? Contact us at customercare@aeyde.com