Bejan, A. (2022). Time and Beauty: Why Time Flies and Beauty Never Dies

What the author saw and its core results

Adrian Bejan observed that human perceptions of time accelerating with age and of beauty in symmetric or proportioned forms arise from the same physical mechanism: the flow of visual information through branching neural architectures that evolve for easier access under the constructal law. The book applies constructal theory—systems persist by evolving configurations that facilitate flow—to explain why older brains acquire fewer new mental images per unit of clock time and why designs aligned with horizontal scanning and efficient ratios feel aesthetically right.

Core results follow directly. Time perception slows because neural pathways lengthen and branch with growth and then degrade, reducing the rate at which the eyes and brain process distinct images. Beauty perception aligns with flow-optimized geometries, such as the golden ratio, because these minimize scanning effort across the visual field. Both phenomena demonstrate that subjective experience tracks objective changes in flow architecture.

Exact primary passages and citations

The 2022 World Scientific monograph extends earlier statements. A verifiable passage from related exposition states: “Lying in bed in the middle of the night not long ago, it occurred to me that these two ideas are actually one and the same. The ideas of beauty and time are usually thought of as abstract ideas that can’t be explained. But they both arise from the mechanics of how our eyes move. In other words, the way in which we perceive both time and beauty arises out of physics.” (Duke Pratt School of Engineering announcement, 17 February 2022, reporting Bejan’s synthesis).

Earlier grounding appears in the 2019 European Review paper “Why the Days Seem Shorter as We Get Older,” which supplies the mechanistic account later consolidated in the book: aging slows image acquisition because “tangled webs of nerves and neurons mature, they grow in size and complexity.” The 2022 volume organizes these into three main ideas centered on time perception, beauty as flow efficiency, and their joint origin in constructal evolution.

No page-specific excerpts from the printed monograph appear in publicly indexed sources. All claims drawn from the book therefore carry the source status unsourced for verbatim pagination.

Convergence patterns touched

The work evidences flow networks, symmetry, and scale invariance. Branching neural trees constitute flow networks whose configuration changes predictably with size and age. Horizontal orientation and golden-ratio proportions illustrate symmetry that reduces scanning work. Scale invariance appears in the repeated application of the same constructal principle from river deltas to city layouts to retinal and cortical pathways.

Distance from the full OIP/GRAIN synthesis

Bejan supplies a mechanistic account of how energy-flow optimization produces structural patterns that include memory-like image integration and aesthetic preference. This sits close to the Ladder step from flow to structure and from structure to memory. It remains at the level of inanimate and biological flow systems; it does not address the Mirror Layer in which the observer is inside the observed system or the full progression through life and mind. The distance is therefore one step short of reflexive self-application.

Honest limits and disconfirming edges

The account is interpretive physics applied to psychology; it offers no new empirical measurements of image-acquisition rates across age cohorts within the 2022 text itself. Reductionist objections note that subjective time also depends on attention, emotion, and memory encoding factors outside pure flow geometry. Bejan acknowledges the extension of science into previously descriptive domains but supplies no controlled experiments that isolate constructal flow from competing explanations such as dopaminergic modulation of interval timing. Claims about beauty therefore remain at the mechanistic tier pending direct tests of scanning effort versus reported aesthetic value.

Claims

• The constructal law states that finite-size flow systems evolve to provide easier access to currents; this is the sole physical principle invoked for both time and beauty perceptions. (mechanistic, source unsourced)
• Neural pathway branching increases with maturation and then degrades, lowering the rate of new image acquisition and thereby accelerating subjective time. (mechanistic, source unsourced)
• The golden ratio and horizontal visual field alignment minimize eye-movement work and therefore register as beauty. (mechanistic, source unsourced)
• Perceptions of time and beauty share a common origin in the mechanics of ocular and neural flow. (mechanistic, source “Duke Pratt announcement 2022”)
• The synthesis stops short of reflexive application to the observer’s own position within the flow system. (speculative, source unsourced)