Free 4D Earth Book

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The discussion centers on a free PDF book titled "Elsewhere: Everyday Life On A Hypergeometric Earth," which explores the concept of a four-dimensional Earth. It provides an accessible introduction to hyperdimensional geometry, focusing on intuitive concepts rather than complex mathematics, with detailed illustrations to aid understanding. The book is designed for readers interested in theoretical physics and geometry without requiring advanced mathematical knowledge. It aims to stimulate curiosity about the implications of additional spatial dimensions on everyday life. Overall, it serves as a resource for those looking to explore the fascinating idea of a four-dimensional reality.

Thread 'Tidally-locked planets flipping around their axes'

Recently, I’ve heard from Anton Petrov on YouTube that some tidally-locked planets around red-dwarf stars (such as TRAPPIST-1) have been suspected to flip around their own axis every once in a while — so that the former day side becomes the night side, and vice versa. This is presumed to happen for the same reason as why a T handle set in a rotating motion on a space station starts flipping back and forth. The latter is an issue we discussed for spaceship designs, when it came to how...
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