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Another important property of string theory is its supersymmetry, which together with extra dimensions are the two main proposals for resolving the hierarchy problem of the standard model, which is (roughly) the question of why gravity is so much weaker than any other force. The extra-dimensional solution involves allowing gravity to propagate ...
Brief Answers to the Big Questions is a popular science book written by physicist Stephen Hawking, and published by Hodder & Stoughton (hardcover) and Bantam Books (paperback) on 16 October 2018. The book examines some of the universe 's greatest mysteries, and promotes the view that science is very important in helping to solve problems on ...
Many Celtic Immrams or "voyage stories" and other medieval texts provide evidence of a Celtic belief in an otherworld. One example which is helpful to understand the Celtic concept of the otherworld is The Voyage of Saint Brendan. Another classic example of a Celtic "otherworld" appears in the Voyage of Bran. In Celtic oral tradition, the ...
The "mirror world" would contain copies of all existing fundamental particles. [81] [82] Another twin/pair-world or "bi-world" cosmology is shown to theoretically be able to solve the cosmological constant (Λ) problem, closely related to dark energy: two interacting worlds with a large Λ each could result in a small shared effective Λ. [83 ...
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A possible world is a complete and consistent way how things could have been. [19] The actual world is a possible world since the way things are is a way things could have been. There are many other ways things could have been besides how they actually are. For example, Hillary Clinton did not win the 2016 US election, but she could have won them.