From Wonder to Uncertainty: A Reading Journey Through Cosmology and String Theory
My first real encounter with cosmology—outside science fiction—came surprisingly early. I must have been in seventh or eighth grade when I picked up Isaac Asimov’s The Collapsing Universe. In Swedish it was called Svarta hål och kosmiska ägg—“Black Holes and Cosmic Eggs”—which, in hindsight, might be one of the most wonderfully strange titles imaginable for a schoolchild browsing a library shelf.
I found it while preparing a five-minute classroom presentation and ended up reading the entire book twice. The books that followed trace more than an expanding interest in cosmology and theoretical physics. They record a change in what I expected science to give me. I began with the sense that the universe was full of astonishing answers waiting to be explained. Later, I became more interested in how we distinguish an explanation from an elegant possibility.
The movement was not from wonder to disillusionment. It was from wonder to uncertainty—and eventually to the recognition that uncertainty is not necessarily the enemy of understanding.
Black Holes and Cosmic Eggs
When the day came to present, I enthusiastically talked about stellar fusion, the evolution of stars and how sufficiently massive stars can collapse into neutron stars or black holes. I suspect most of my classmates were lost somewhere between hydrogen fusion and gravitational collapse. The teacher seemed impressed, however, which probably reinforced my feeling that I had stumbled onto something important.
Until then I had been a heavy reader, regularly carrying bags of books home from the library, but almost all of them were fiction. Asimov showed me that nonfiction could deliver the same sense of scale and imaginative possibility while claiming to describe the universe that actually existed. That claim changed the experience. A fictional universe might be larger or stranger than everyday life, but Asimov was saying that white dwarfs, neutron stars, black holes and the possible death of the cosmos belonged to reality.
The English original appeared in 1977. Prisma published the Swedish translation in 1981, followed by the Prisma Magnum edition pictured here in 1983. By the time I encountered it, parts of its scientific picture already belonged to an earlier stage of cosmology. That mattered less to the younger reader than Asimov’s explanatory confidence. He could begin with ordinary matter and proceed step by understandable step towards objects so extreme that they seemed to belong in science fiction.
The strangeness did not arrive as magic. It emerged from an argument.
When Possibility Felt Like Progress
A few years later, after I had largely moved from reading in Swedish to reading in English, I picked up Michio Kaku’s Hyperspace. If Asimov had opened the door to cosmology, Kaku made the room behind it appear much larger. This was my first sustained exposure to string theory, higher-dimensional physics, wormholes and parallel universes.
Kaku had a talent for making abstract ideas feel almost tangible. The possibility that the universe might contain dimensions beyond the familiar three of space and one of time was utterly mind-bending. Even when I understood only fragments of the physics, the larger picture was intoxicating. Modern theoretical physics seemed to be investigating questions every bit as imaginative as the science fiction I loved.
Books of this kind perform a difficult balancing act. They explain well-established physics while carrying the reader towards the speculative frontier, often in the same confident voice. General relativity, quantum mechanics, extra dimensions, wormholes and string theory can appear in neighbouring chapters even though they do not possess the same evidential status. I did not understand that distinction clearly at the time. Possibility itself felt like progress.
Brian Greene’s The Elegant Universe, first published in 1999, gave that possibility a more focused narrative. Quantum mechanics and general relativity described their respective domains with extraordinary success, yet resisted incorporation into one straightforward framework. String theory offered a possible resolution by replacing point-like fundamental particles with tiny one-dimensional objects whose different vibrational states could appear as different particles.
Higher dimensions were no longer merely exotic additions to an already strange universe. They became part of a proposed structure in which gravity and quantum physics might coexist. Greene presented the subject with enough clarity and narrative momentum that string theory began to feel less like one ambitious research programme among others and more like the direction in which fundamental physics was naturally moving.
Greene’s follow-up, The Fabric of the Cosmos, broadened the discussion towards space, time, quantum mechanics and the nature of reality. I remember it as the book in which Hugh Everett’s Many-Worlds interpretation first lodged firmly in my imagination: the possibility that quantum alternatives might persist in separate branches rather than one outcome being uniquely selected.
I returned to that question much later in my review of Sean Carroll’s Something Deeply Hidden. Many-Worlds now strikes me as both more serious and less intuitively satisfying than its popular shorthand suggests. At the time, however, it belonged to one expanding intellectual horizon in which theoretical physics appeared to be approaching a deeper layer of reality. For a while, string theory did not merely seem plausible to me. It felt inevitable.
A Fertile Theory Is Not Necessarily a Confirmed One
Popular accounts of fundamental physics often take the form of a quest. Two enormously successful theories remain difficult to reconcile. Generations of physicists search for a deeper framework. Mathematical clues accumulate, partial connections appear and a final theory seems to wait just beyond the next conceptual breakthrough. It is an irresistible narrative, especially for a reader raised on stories in which scattered clues eventually reveal one hidden design.
Actual scientific progress is less obliging. A research programme can produce important results without achieving its largest ambition, and string theory has unquestionably been theoretically fertile. For certain highly idealised black holes, researchers were able to reproduce the Bekenstein–Hawking entropy by counting microscopic states within string theory. The development of gauge/gravity duality proposed an equivalence between certain gravitational or string theories in anti-de Sitter space and quantum field theories without gravity on the boundary of that space.
These were not decorative mathematical side effects. They changed how physicists approached black holes, quantum gravity and relationships between theories that had previously appeared quite different. At the same time, theoretical fertility and empirical confirmation answer different questions. A framework can generate powerful tools and unsuspected connections without yet demonstrating that its fundamental objects describe the physical structure of our universe.
The Large Hadron Collider became part of my changing view, although its significance requires care. The LHC was never a direct experiment on fundamental strings. It could instead search for lower-energy phenomena associated with some string-inspired models and with broader attempts to extend the Standard Model, including supersymmetric partner particles and signatures of extra dimensions.
The collider was hardly silent. ATLAS and CMS discovered the Higgs boson in 2012, and LHC measurements have tested the Standard Model across an enormous range of processes. What did not appear were the comparatively accessible signs of supersymmetry that many physicists had hoped might accompany the Higgs. No superpartner has been observed, and successive searches have excluded portions of the parameter space once considered especially promising. In March 2026, for example, ATLAS reported stronger constraints on compressed higgsinos after finding its data consistent with Standard Model predictions.
Those results weaken particular expectations, especially simple forms of low-energy supersymmetry motivated by attempts to explain why the Higgs mass is not much larger. They do not directly falsify string theory. The possible low-energy consequences of string constructions are too varied for the failure of one family of searches to decide the entire programme.
That breadth is both an intellectual resource and a source of frustration. A framework capable of describing many possible low-energy worlds can survive the failure of any one expected signal. Yet the more outcomes it can accommodate after the fact, the harder it becomes to identify which observation would count decisively against the larger structure.
What felt to me like the goalposts moving was more accurately the retreat of the easiest experimental expectations. Supersymmetric particles had not logically been shown to be absent. They might be heavier, more weakly interacting or arranged in ways that produce difficult signatures. Each revision could be scientifically defensible. Taken together, however, they weakened the earlier impression that experimental resolution was just around the corner.
Criticism, Beauty and Testability
Around 2007, I read Peter Woit’s Not Even Wrong. Woit’s case is deliberately confrontational. He argues that string theory had come to dominate fundamental physics despite failing to produce distinctive predictions that could be compared with experiment. In his account, mathematical sophistication and institutional prestige were beginning to substitute for exposure to possible failure.
The book is not a neutral history of the field, and its strongest language should be recognised as polemic rather than consensus. It can understate the genuine achievements of string research and the unusual difficulty of investigating physics at scales far beyond present experiments. Even so, it forced a question that the more enthusiastic books had allowed me to postpone: what would need to happen for the programme to be judged wrong?
A theory does not cease to be scientific merely because experiments are difficult, indirect or temporarily unavailable. Frontier research often advances through incomplete models, mathematical consistency checks and connections with neighbouring fields. Demanding an immediately affordable experiment for every idea would eliminate much legitimate theoretical work.
Some path towards empirical or theoretical discrimination nevertheless matters. Without it, a framework can become an extraordinarily rich language for organising possible worlds without identifying which world nature selected. The difficulty lies in deciding how long a research programme can remain productive under those conditions and what forms of indirect success should count in its favour.
This concern resurfaced when I encountered Sabine Hossenfelder’s writing on naturalness, symmetry and aesthetic judgement. Her Lost in Math: How Beauty Leads Physics Astray argues that ideas such as elegance and naturalness have acquired more authority in fundamental physics than the evidence warrants.
Beauty is not useless. Symmetry, simplicity and mathematical elegance have helped physicists find extraordinarily successful theories. The danger begins when a historically productive heuristic is treated as evidence in its own right. Successful elegant theories become proof that nature prefers beauty, while elegant theories that failed are less likely to remain prominent in the story physicists tell about their methods.
Experimental feedback normally corrects such judgements. A beautiful model suggests where to look; data then reveal whether the suggestion was productive. In quantum gravity and physics beyond the Standard Model, that feedback can be weak, costly or absent for decades. Elegance can then become self-reinforcing: a theory attracts attention because it possesses desirable mathematical properties, the attention produces increasingly sophisticated results, and that sophistication becomes further evidence that the original choice was justified.
Lost in Math resonated because it gave a clearer form to an unease I had struggled to express. String theory’s beauty was never the problem. I had mistaken beauty—and the confidence with which it was narrated—for evidence that confirmation was drawing close.
From Belief to Calibration
Asimov, Kaku, Greene, Woit and Hossenfelder now form a recognisable intellectual sequence in my reading life. The sequence begins with the discovery that nonfiction can create wonder as effectively as fiction. It passes through confidence that a grand unifying structure may be close and arrives at a more cautious understanding of how slowly evidence can accumulate.
I did not move from believing that string theory was nearly complete to believing that it was worthless. The change was one of calibration. I became less willing to treat a speculative framework as an almost-finished discovery because it was elegant, widely studied or embedded in a compelling historical narrative. I also became less willing to dismiss difficult foundational research simply because decisive experiments were unavailable.
Scientific scepticism does not require contempt, just as intellectual excitement does not require premature belief. A theory can be worth studying without being confirmed. A mathematical development can transform neighbouring fields without establishing that nature uses the structure from which it emerged. A popular-science book can change a reader’s life even when the scientific programme it celebrates develops differently from what the book appeared to promise.
My reading changed in another way as well. Over time, nonfiction gradually occupied more of the space once dominated by novels. In 2025, for the first time, I read more nonfiction than fiction—a shift I discussed in my reading recap for the year. That change may reflect the same impulse that began with Svarta hål och kosmiska ägg: the discovery that reality can be every bit as strange as fiction while remaining much less willing to arrange itself into a satisfying narrative.
The younger reader wanted to know what the universe was made of, how many dimensions it contained and whether one final theory might bring everything together. I still want to know those things. What changed is my understanding of what an answer requires.
A beautiful equation can expose an unsuspected structure. A speculative framework can generate important knowledge long before direct evidence appears. Neither possibility, coherence nor beauty is identical to confirmation.
The most durable gift of those early books was therefore not confidence in one particular account of the universe. It was a fascination strong enough to survive the weakening of certainty. The questions never went away. What changed was my idea of what counts as an answer.
Comments
Post a Comment