Overview

Why does space have three dimensions? Not two, not four, not fourteen but three. We navigate them every day, launch spacecraft through them, build our lives inside them, and yet physics has never explained why this number, and no other, defines our reality. In Why Space Has Three Dimensions, Anvay Sheolikar takes readers on a journey from India's historic Chandrayaan-3 Moon landing through Einstein's curved spacetime, Hawking's evaporating black holes, and the revolutionary idea that space itself might be woven from quantum entanglement. Along the way, it explores some of the deepest questions in modern science: Is time fundamental, or does it emerge? Could the laws of physics themselves be emergent? What would it mean to engineer spacetime? Drawing on holography, tensor networks, quantum error correction, and the latest experiments in quantum simulation, Anvay builds a case that space is not a cosmic accident but a consequence. He introduces readers to the scientists, Indian and international, whose work has reshaped our understanding of reality, from Subrahmanyan Chandrasekhar's calculation on a steamship to the Google Willow quantum processor. Why Space Has Three Dimensions is the first popular science book dedicated entirely to this question, so fundamental that it has been overlooked. Written for the curious, who has ever looked at the world and wondered: why is it built this way? Space is a Verb, not a Noun.

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