Space and time are the most fundamental features of our experience of the world, and yet they are also the most perplexing. Does time really flow, or is that simply an illusion? Did time have a beginning? What does it mean to say that time has a direction? Does space have boundaries, or is it infinite? Is change really possible? Could space and time exist in the absence of any objects or events? Are our space and time unique, or could there be other, parallel worlds with their own space and time? What, in the end, are space and time? Do they really exist, or are they simply the constructions of our minds? Robin Le Poidevin provides a clear, witty, and stimulating introduction to these deep questions, and many other mind-boggling puzzles and paradoxes. He gives a vivid sense of the difficulties raised by our ordinary ideas about space and time, but he also gives us the basis to think about these problems independently, avoiding large amounts of jargon and technicality. His book is an invitation to think philosophically rather than a sustained argument for particular conclusions, but Le Poidevin does advance and defend a number of controversial views. He argues, for example, that time does not actually flow, that it is possible for space and time to be both finite and yet be without boundaries, and that causation is the key to an understanding of one of the deepest mysteries of time: its direction. "Travels in Four Dimensions" draws on a variety of vivid examples and stories from science, history, and literature to bring its questions to life. No prior knowledge of philosophy is required to enjoy this book. The universe might seem very different after reading it.
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每个人都想知道这个世界的秘密，而物理学似乎又掌握着众多秘密中极为诱人的一个。不幸的是，不是每个人都能成为物理学家，而众多科普书籍看起来也似乎又不那么的科普。但事实是——物理学家也并没有掌握这个世界所有的答案，所以更合理的说法是，他们掌握着更多的问题。因此幸...
评分 评分 评分这是我读过的最有意思的一则关于世界尽头的猜想。 庞加莱曾提出过这样的一个假想宇宙（可惜豆瓣的评论都不能贴图）：这个宇宙是有边界的，但当物体离开宇宙的中心的时候，它们的体积会收缩。根据庞加莱的精心设计，这个宇宙是一个理想的球形，如果宇宙中心的任意物体体积为v，...
评分这是我读过的最有意思的一则关于世界尽头的猜想。 庞加莱曾提出过这样的一个假想宇宙（可惜豆瓣的评论都不能贴图）：这个宇宙是有边界的，但当物体离开宇宙的中心的时候，它们的体积会收缩。根据庞加莱的精心设计，这个宇宙是一个理想的球形，如果宇宙中心的任意物体体积为v，...
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