Seeing More Clearly

How another piece of the puzzle quietly falls into plac

Science Rarely Moves in Straight Lines

One of the greatest misconceptions about science is that it advances through dramatic moments of revelation. Popular culture loves the image of the lone scientist suddenly crying, “Eureka!” before the world is transformed forever. Reality is usually much quieter. Most scientific progress arrives not as a thunderclap, but as the slow accumulation of careful observations made by many different people, often working independently, often asking entirely different questions.

Knowledge grows rather like the assembly of a vast jigsaw puzzle. At the beginning, there are only scattered pieces lying across the table. A single fragment may reveal little more than a patch of blue sky or the corner of a building. It is tempting to stare at that solitary piece and imagine the entire picture, but experienced scientists learn to resist that temptation. One observation, no matter how intriguing, is rarely the whole story. It only becomes meaningful when it finds its place alongside other observations.

This is one of the reasons that good science demands patience. Every new technique shines its light on only part of a problem. Histology reveals the architecture of tissues. Chemistry identifies elements. Proteomics catalogues proteins. Spectroscopy explores molecular structure. Microscopy exposes form. Each discipline offers a different window into the same biological landscape. None, on its own, can claim to reveal the entire territory.

That distinction has become a recurring theme throughout this series. We have often explored the difference between our scientific maps and the underlying territory. Every experiment produces a map—a useful but inevitably incomplete representation of reality. The danger begins when we mistake that map for the territory itself. We become attached to our favourite explanation. We defend our own results as though they alone contain the truth. Yet nature owes no allegiance to our theories. It simply continues to be what it is, waiting patiently for us to see it more clearly.

Over the past several years, researchers investigating the unusual white fibrous intravascular casts recovered during embalming have gradually begun assembling that larger picture. Different laboratories have examined different aspects of these remarkable structures, employing different analytical techniques and approaching the problem from different scientific traditions. Some have studied their physical appearance. Others have explored their microscopic architecture. Others have analysed their elemental composition or identified the proteins they contain. More recently, another group has asked a different, but equally important, question: How are some of those proteins actually folded?

That question has produced another interesting piece of the puzzle.

It is not the final piece. Nor does it overturn what has already been discovered.

Instead, it quietly expands the picture.

And that is exactly how science is supposed to work.

The First Observations

Science often begins in unexpected places. Not in university laboratories. Not inside billion-dollar research institutes. Not even in hospitals.

Sometimes it begins with someone quietly noticing that something no longer looks quite right. That was certainly the case here.

Around 2021, embalmers working in different parts of the world began reporting an unusual observation during the routine preparation of deceased individuals. As they cannulated major blood vessels and attempted to introduce embalming fluid, they increasingly encountered long, pale, rubbery structures occupying the lumens of arteries and veins. These were unlike the dark red post-mortem clots they had spent entire careers removing. They were firm yet elastic, often white or cream in colour, branching through the vascular tree and, in some cases, extending for remarkable distances. Many resisted traction, stretching before finally breaking with an almost rubber-like resilience.

To experienced embalmers, these structures were sufficiently unusual that they immediately attracted attention. Most had never encountered anything quite like them during decades of professional practice. Some began photographing them. Others preserved specimens. Eventually, as communication between embalmers increased, they realised that these observations were not isolated events. Similar reports were emerging from different cities, different countries and different funeral homes.

At this point it is worth remembering something that is easily forgotten in today’s highly polarised world. An observation is not a conclusion. The embalmers were not offering explanations. They were not proposing mechanisms. They were not attempting to assign causes. They were simply reporting what they believed they were seeing with increasing frequency during their everyday work.

That distinction is fundamental to the scientific method. Observations come first. Explanations come later.

Unfortunately, the modern scientific environment often encourages the reverse. Faced with an unexpected observation, there is a natural tendency to reach immediately for a familiar explanation—or, if the observation is uncomfortable, to dismiss it altogether. Yet history repeatedly reminds us that some of the most important scientific discoveries began as awkward observations that did not fit comfortably within existing models.

The reports from embalmers presented precisely this kind of challenge. Were these structures simply unusual examples of conventional post-mortem clotting? Were they artefacts created during embalming? Were they associated with previously recognised pathological processes? Or were they something genuinely different that had simply escaped attention until now?

At that stage, nobody knew.

The only intellectually honest answer was that the phenomenon deserved investigation.

That simple decision—to observe carefully before deciding what the observations meant—marked the true beginning of the scientific journey.

Like many scientific investigations, the next steps did not follow a single, coordinated plan. Different researchers, working independently and often separated by thousands of kilometres, began examining the problem using the tools available to them. Each laboratory asked slightly different questions. Each applied different techniques. Each uncovered different pieces of evidence. At first glance, these separate investigations sometimes appeared to point in different directions.

In reality, they were simply illuminating different parts of the same landscape.

And as the evidence slowly accumulated, the picture became steadily richer, more complex, and far more interesting than anyone had imagined at the beginning.

Our Journey: Asking Different Questions

When our own investigation began, we deliberately resisted the temptation to begin with a preferred explanation. The structures were unusual enough that almost every possibility remained open. Were they simply variants of ordinary post-mortem thrombi? Were they artefacts produced during embalming? Had they always existed but escaped notice? Or were they genuinely novel biological structures? At the outset, there was simply no way of knowing.

Our guiding principle was straightforward: observe first, interpret later.

That philosophy shaped every stage of the work that followed. Rather than attempting to force the specimens into an existing theoretical framework, we asked a series of progressively deeper questions. Each question required a different analytical technique, and each technique provided another small piece of the emerging picture.

The first question was almost deceptively simple.

What do these structures actually look like?

Careful gross examination revealed that they differed strikingly from conventional post-mortem clots. Instead of the familiar dark red, gelatinous masses encountered routinely in mortuary practice, these specimens were frequently white to cream in colour, firm yet remarkably elastic, and often formed long, branching casts that appeared to conform closely to the internal geometry of the vascular system. Their physical appearance alone suggested that they deserved closer investigation.

The next step was histology. By examining thin sections under the microscope, we hoped to determine whether these structures simply represented an unusual form of fibrin clot or whether their internal architecture differed in more fundamental ways. Histological examination revealed an unexpectedly complex picture. Regions of fibrin were certainly present, but they did not resemble the uniform architecture expected of conventional thrombi. Instead, the material displayed considerable structural heterogeneity, including laminated regions, variable densities, sparse red blood cells and other features that suggested these casts were biologically more complex than initially assumed.

Chemistry then offered another perspective. Using inductively coupled plasma mass spectrometry (ICP-MS), we examined their elemental composition. Once again, the results challenged simple explanations. Certain elements were present in concentrations that differed substantially from what would be expected if these structures consisted solely of ordinary fibrin clot. In particular, phosphorus emerged as a recurring feature of interest, while other elemental patterns hinted that the casts contained components extending beyond a simple proteinaceous mass.

Proteomics added yet another layer. By identifying hundreds of proteins within the material, we were able to explore its biochemical composition in unprecedented detail. As expected, fibrin-related proteins were abundant, confirming that fibrin formed an important part of the overall structure. Yet the proteomic profile also demonstrated considerable complexity. Rather than revealing a simple clot composed of one or two familiar constituents, the analyses suggested that these casts represented highly organised biological assemblies containing numerous interacting proteins. At the same time, our elemental analyses reminded us that proteins alone were unlikely to account for the entire mass of the structures.

Each analytical technique therefore answered one question while simultaneously raising several new ones.

By this stage, one conclusion was becoming increasingly difficult to avoid. These specimens did not fit comfortably within the traditional categories of either ordinary post-mortem clot or conventional thrombus. They appeared to represent something biologically more complex—structures whose formation, composition and persistence would require explanation at multiple levels of organisation.

Importantly, however, none of these investigations answered every question. Histology reveals architecture but not molecular folding. Proteomics identifies proteins but says relatively little about their three-dimensional structure. Elemental chemistry measures atoms, not biological organisation. Each method illuminated one aspect of the problem while leaving other aspects in shadow.

Far from being a weakness, this is how science normally progresses. Every experiment provides another glimpse into the territory, but no single experiment reveals the whole landscape.

It is precisely at this point that another group of researchers entered the story. Rather than asking what proteins were present, or what elements the casts contained, they asked an entirely different question—one that none of our earlier techniques could answer.

They asked how some of those proteins were actually folded.

Another Group Asked a Different Question

One of the strengths of scientific research is that different investigators rarely ask exactly the same question.

This is not duplication of effort; it is the very mechanism by which understanding grows. A complex biological phenomenon cannot usually be explained by a single experiment or even a single discipline. Different scientists bring different expertise, different instruments and different ways of thinking to the same problem. Each approach reveals something that the others cannot.

Recently, another research group extended the investigation of these anomalous intravascular casts by approaching the problem from a very different direction. Rather than focusing primarily on morphology, histology, elemental chemistry or protein identification, they turned their attention to molecular structure. Their central question was deceptively simple:

How are the proteins within these structures actually folded?

At first glance, this might appear to be a rather specialised question, yet it has profound biological significance. Proteins are not simply chains of amino acids. They are three-dimensional molecular machines whose function depends critically upon the way they fold. The same protein can behave in remarkably different ways depending upon its molecular architecture. Under certain circumstances, proteins that normally exist in relatively flexible configurations can reorganise into much more ordered structures dominated by what are known as beta sheets. Such changes can dramatically alter their physical properties, making them more rigid, more resistant to degradation and, in some cases, capable of forming highly stable aggregates.

To explore this possibility, the investigators employed Raman micro-spectroscopy, a powerful analytical technique that examines how laser light interacts with molecular bonds. Unlike conventional microscopy, which shows us what a structure looks like, Raman spectroscopy provides information about the vibrational behaviour of molecules themselves. Those molecular vibrations contain valuable clues about the secondary structure of proteins—the way their peptide chains are folded into alpha helices, beta sheets and other structural arrangements.

Using this technique, the researchers examined two representative specimens of the intravascular casts. Although both contained clear protein signatures, one specimen displayed spectral features that were interpreted as being more consistent with relatively native protein organisation, while the second exhibited stronger evidence of beta-sheet enrichment. In particular, changes within the Amide I region of the Raman spectrum suggested that some proteins within this specimen had adopted a more ordered molecular configuration than is typically associated with ordinary soluble proteins.

This was an intriguing observation.

If confirmed by further work, it suggests that at least some regions within these unusual casts may undergo progressive structural maturation, with proteins becoming increasingly organised into more stable molecular assemblies over time. Such a process could potentially help explain one of the observations repeatedly made by embalmers—the remarkable toughness, elasticity and persistence of many of these structures during vascular preparation.

Perhaps equally important was the restraint shown by the authors in interpreting their own findings. Although beta-sheet enrichment is frequently associated with amyloid biology, they repeatedly emphasised that their results did not establish the presence of classical amyloid fibrils. Raman spectroscopy can detect changes in protein secondary structure, but it cannot, by itself, demonstrate the highly ordered cross-beta fibrillar architecture that formally defines amyloid. The authors therefore acknowledged that additional techniques—including electron microscopy, Congo red birefringence, X-ray diffraction and complementary biochemical analyses—would be required before such a conclusion could be drawn.

That distinction deserves emphasis.

In an age where scientific discoveries are often exaggerated before the evidence is complete, there is something refreshing about researchers who openly acknowledge the limits of their own methods. Their study does not claim to have solved the mystery of these casts. Rather, it contributes another carefully measured observation to an investigation that is still unfolding.

And that, perhaps, is its greatest strength.

The significance of this work lies not in the claim that the mystery has been solved, but in the fact that another independent line of evidence has now entered the conversation. Like every careful experiment before it, the study does not close the book. Instead, it adds another chapter.

Looking Through Different Windows

One of the most persistent problems in modern science is the tendency to confuse individual observations with complete explanations. A new experiment produces an interesting result, and almost immediately there is pressure to answer the largest possible question. Is this the mechanism? Is this the cause? Is this the answer?

Nature, however, is rarely so accommodating.

Biological systems are organised across many different levels. At the smallest scale are atoms and molecules. Above them are proteins, lipids and carbohydrates. These assemble into fibres, membranes and extracellular matrices, which in turn form cells, tissues, organs and, ultimately, whole organisms. No single analytical technique can simultaneously describe every one of these levels. Each instrument, no matter how sophisticated, reveals only part of the picture.

Perhaps it is helpful to imagine standing outside a large house.

One person peers through the kitchen window and sees someone preparing a meal. Another looks through a study window and notices shelves filled with books. A third glances through a bedroom window and sees someone making a bed. A fourth looks into the garage and observes a workbench covered with tools.

If these four observers later compare notes, their descriptions will differ dramatically. One may conclude that the building is a kitchen. Another insists that it is a library. A third argues that it is clearly a bedroom. A fourth believes it must be a workshop.

In reality, none of them is wrong.

They have simply been looking through different windows into the
same house.

Scientific investigations often proceed in exactly the same way.

Histology allows us to look through one window. It reveals the organisation of tissues, the arrangement of fibres and cells, and the microscopic architecture of biological material. It tells us what the structure looks like.

Elemental chemistry opens another window. Techniques such as ICP-MS reveal the atoms that make up a specimen. They tell us what chemical elements are present, but not how those atoms are assembled into biological structures.

Proteomics provides yet another view. It identifies proteins and estimates their abundance, allowing us to ask which molecular building blocks are present. It says remarkably little, however, about how those proteins are folded or organised within the material itself.

Raman spectroscopy opens a different window again. Rather than identifying proteins, it examines the vibrational behaviour of their molecular bonds, providing clues about secondary structure and protein folding. It asks not simply what proteins are present, but what physical state those proteins occupy.

Each technique therefore answers a different scientific question.

None invalidates the others.

Indeed, it would be surprising if they all produced identical answers, because they are not measuring the same property.

Viewed in this way, the recent Raman study does not compete with the earlier histological, elemental or proteomic investigations. Instead, it complements them. It adds another layer of information to a biological structure that is already proving to be far more complex than initially imagined.

This, perhaps, is one of the most encouraging developments to emerge from the past several years of research. Independent laboratories, working in different countries and employing entirely different analytical methods, are beginning to converge upon a remarkably similar conclusion. Whatever these anomalous intravascular casts may ultimately prove to be, they are unlikely to represent simple, homogeneous fibrin clots. They appear instead to be biologically complex structures whose composition, organisation and physical behaviour cannot be explained by any single analytical technique alone.

That realisation is, in many respects, more important than any individual experimental result.

Science advances most rapidly when independent lines of evidence begin pointing toward the same landscape, even though each has arrived there by a different path.

The challenge now is not to decide which window offers the “correct” view.

The challenge is to step outside the house altogether and begin constructing a picture that incorporates every window.

Only then do we begin to understand the building as a whole.

The Picture Is Becoming Richer

One of the most satisfying moments in scientific research is not when a long-held belief is overturned, but when several independent observations suddenly begin to make sense together.

It is a subtle moment rather than a dramatic one. Nothing new has necessarily been discovered that day. No single experiment has provided the missing answer. Instead, there comes a gradual realisation that findings which once appeared unrelated are beginning to converge. Pieces that once lay scattered across the table now seem capable of fitting together into a larger and more coherent picture.

This may be one of those moments.

For several years, researchers examining these unusual intravascular casts have approached them from many different directions. Gross morphology suggested that they differed from ordinary post-mortem thrombi. Histology revealed complex internal architecture rather than the relatively uniform appearance expected of conventional fibrin clots. Elemental analyses demonstrated unusual chemical characteristics that hinted the material was more than simply aggregated protein. Proteomic studies identified a rich and diverse collection of proteins while simultaneously suggesting that proteins alone could not account for the entire structure. More recently, Raman spectroscopy has added evidence that at least some of those proteins may adopt altered secondary structures characterised by increased beta-sheet organisation.

Taken individually, each of these findings is interesting.

Taken together, they become something far more compelling.

What begins to emerge is not the picture of a simple clot, nor the picture of a simple protein aggregate, but something considerably more sophisticated. These structures increasingly appear to behave as composite biological assemblies. They possess physical architecture, complex chemistry, diverse protein composition and, perhaps, evolving molecular organisation. Each level of investigation reveals another aspect of the same object, much as examining a cathedral from different angles gradually reveals details that cannot be appreciated from a single viewpoint.

This is an important conceptual shift.

Scientists naturally like simple explanations. Simplicity is elegant. Simplicity is satisfying. Yet biology often refuses to cooperate. Living systems are built from layers upon layers of interacting processes, each influencing the others in ways that are not immediately obvious. Blood itself provides an excellent example. It is not merely a suspension of cells in liquid. It is a dynamic, highly organised tissue composed of proteins, lipids, electrolytes, signalling molecules, extracellular vesicles, immune cells and an intricate coagulation system, all interacting continuously within a living vascular network.

If an unusual biological structure arises within such a system, should we really expect it to consist of only one thing?

Perhaps not.

Perhaps we have been asking the wrong question.

Instead of asking whether these casts are fibrin, or amyloid, or mineral, or protein, we may need to ask a more mature scientific question:

To what extent do they contain each of these components, and how are those components organised into a single biological structure?

That question immediately changes the nature of the investigation.

No longer are different laboratories competing to identify the “correct” explanation. Instead, they become collaborators—whether intentionally or not—in describing different levels of the same phenomenon.

One laboratory identifies proteins.

Another measures elemental composition.

Another examines tissue architecture.

Another studies molecular folding.

Each contributes another paragraph to a story that none could
write alone.

Viewed from this perspective, the recent Raman study is not a destination.

It is another milestone.

Not because it answers every question, but because it asks a new one—and in doing so, encourages the rest of us to think more deeply about the remarkable complexity of the structures we are trying to understand.

Perhaps the greatest lesson emerging from this body of work is that nature is under no obligation to fit neatly into the categories we have inherited. The biological world is infinitely more inventive than our textbooks, and every now and then it presents us with something that refuses to be squeezed into familiar definitions.

When that happens, the task of science is not to force reality into an existing box.

The task is to build a better box.

Lessons from COVID: Following the Evidence Wherever It Leads

If there is one lesson that the past several years have taught the scientific community, it is that reality has a stubborn habit of ignoring our expectations.

Long before the pandemic, most scientists would have agreed that the scientific method represented one of humanity’s greatest intellectual achievements. Observe carefully. Form hypotheses. Test them rigorously. Modify those hypotheses when new evidence appears. Repeat. It is a beautifully simple process that has served civilisation remarkably well for centuries.

Yet the COVID era revealed something rather uncomfortable.

Science itself remained sound.

Scientists, however, are still human.

Like everyone else, researchers are capable of becoming attached to ideas. Institutions can become attached to narratives. Entire scientific communities can become invested in explanations that once seemed reasonable but later prove to be incomplete. Under such circumstances, new observations are not always welcomed. Sometimes they are ignored. Sometimes they are dismissed. Occasionally they are ridiculed before they have even been properly examined.

History tells us that this is not unusual.

It has happened repeatedly throughout science.

The discovery of Helicobacter pylori challenged long-held beliefs about stomach ulcers. The recognition that hand hygiene could prevent puerperal fever met fierce resistance during Ignaz Semmelweis‘ lifetime. Continental drift was once regarded as an absurdity. Even plate tectonics, now taught in every secondary school, spent decades on the fringes before sufficient evidence accumulated to make the old explanations impossible to maintain.

None of these examples suggests that every unconventional idea is correct. Far from it. Most new hypotheses eventually prove to be incomplete or entirely wrong.

The lesson is something much simpler.

Unexpected observations deserve careful investigation rather than immediate dismissal.

The anomalous intravascular casts fall squarely into that category.

When embalmers first reported them, many people assumed they must represent ordinary post-mortem clotting. That was a perfectly reasonable initial hypothesis. It was consistent with existing knowledge, and science should always begin with the simplest explanation.

But hypotheses are only starting points.

As more observations accumulated, that original explanation became increasingly difficult to reconcile with the evidence.

Gross morphology raised questions.

Histology raised further questions.

Elemental chemistry revealed unexpected findings.

Proteomics expanded the picture still further.

Now Raman spectroscopy has contributed another independent observation concerning protein organisation.

Notice what has happened.

At no point has a single experiment solved the mystery.

Instead, the weight of evidence has gradually shifted.

This is how genuine scientific revolutions usually occur—not through one spectacular paper, but through the slow convergence of multiple independent observations that become increasingly difficult to ignore.

That process is still underway.

It would therefore be premature to claim that we fully understand these remarkable structures. It would be equally premature to dismiss them simply because they challenge existing assumptions. Both responses place ideology ahead of observation.

Good science does neither.

Good science remains willing to be surprised.

It accepts uncertainty as the price of intellectual honesty. It resists the temptation to draw conclusions that extend beyond the available evidence, yet it is equally unwilling to pretend that uncomfortable observations do not exist.

Perhaps this is the deeper significance of the research now emerging from different laboratories around the world.

The individual findings matter, of course.

But the process matters even more.

Independent investigators, using different techniques, asking different questions and working in different countries, are gradually assembling a body of evidence that is richer, more nuanced and more scientifically satisfying than any single investigation could have produced alone.

This is science at its best.

Not because every answer has been found.

But because the questions are becoming better.

And better questions are often the first sign that we are beginning to understand the problem properly.

Professor Ducklington, reflecting on the tendency to mistake every new discovery for the final answer, offered one of his characteristic observations:

“A wise duck never mistakes the discovery of another feather
for the whole bird.”

It is a deceptively simple remark, but it captures an important scientific truth.

Every careful observation deserves its place. Every well-conducted experiment contributes something of value. Yet no single result, however exciting, should be mistaken for the finished picture.

The challenge is not to celebrate the discovery of another feather.

The challenge is to understand the bird.

And that’s Signal Over Noise.