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Reality Isn't True Either

The fascinating physics of the senses - and how it shapes our perception

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Reality Isn't True Either

De: Florian Aigner, First Unit Productions, Michael J. Diekmann — Other, Oliver Bertram — Other
Narrado por: Izzy Valkyrie
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Why does a metal plate feel much hotter than a wooden one in summer – even though both are at the same temperature? Why can bats hear sounds where everything is silent to us? And is the red I see the same red as the one you see? In our minds, the world is colourful, warm, noisy or well-ordered – but is it really? In his new book, bestselling author Florian Aigner takes us on an astonishing and entertaining journey of discovery through the physics of sensory perception. He shows that our perception is based on very specific physical processes – and why that still doesn't mean we see, hear, smell, taste or feel things as they really are. In fact, it is we ourselves who create the world in our minds! Whether colour, sound, temperature or taste: all these sensory impressions are based on physics, but how we organise, understand and experience them takes place in our brains. And what's more: humans are the only species that have learnt to deliberately expand their senses – through technology, through science, through curiosity. This has given rise to a new kind of evolution: a cultural, self-directed expansion of our consciousness. This book combines accessible physics with surprising anecdotes from biology, technology and culture, whilst posing the big question: What is reality – and how does it arise in our minds?©2026 Brandstätter Verlag (P)2026 First Unit Productions Ciencia y tecnología Educación Literatura y ficción
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Quantum physicist Florian Aigner explains why natural science isn't the only truth, and how that makes the world even more beautiful All it takes is a few sulfur molecules. The substance is called dimethyl sulfide. Plankton produces it, and at the coast it drifts into our noses as the supposed smell of salt. Perhaps the rumble of waves mingles in our ears as well. And by the time we open our eyes, there's no doubt left: we're at the sea. We know this because our sense organs constantly collect physical mosaic pieces, whether light waves, sound waves, or chemical substances. But the "actual reality," the "interesting part of the world," arises in our heads, writes Florian Aigner. Aigner is a quantum physicist, and in that discipline one also deals with particles that can occupy two opposing states at the same time. Perhaps Aigner already understood reality differently as a student. In Reality Isn't True Either: The Fascinating Physics of the Senses, and How It Shapes Our Perception, he first explains how we and other living beings translate physical signals into sensory impressions. And it becomes clear that there is no single reality that reveals itself equally to every animal. Sharks, for example, have a sense that remains hidden from us: electroreception. They can perceive electric fields emitted by other living creatures, and a voltage of just a few billionths of a volt is enough for them. For sharks, this is a decisive advantage when hunting. Humans don't need this sense. In evolutionary terms, what we perceive is mainly what is relevant for survival. But Aigner doesn't stop at the natural-science perspective. Rather, he insists that it isn't enough to explain our experience. Sensory stimuli on their own make no sense. It is our brain that assembles the mosaic pieces into a meaningful picture. It filters, completes, and interprets. Through what we have learned and experienced, through language and upbringing, we can identify the smell of sulfur, name the light waves as blue, and, in the interplay of these impressions, recognize the sea. Physics, then, describes only part of what we experience. Psychology and sociology complement our picture of the world. "If I feel that I feel, then I feel," writes Aigner. "No other facts are closer to me." His book is above all an entertaining introduction to the physical foundations of perception. With humorous examples, Aigner makes even complex topics accessible. But the book's real strength lies in opening up the natural-science perspective and looking beyond the boundaries of individual disciplines. Aigner touches on the psychological and sociological dimensions only briefly. Shedding more light on them is left to other authors. (Melissa Hertwig)
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