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This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. Hypothesis about life in the universe For the concept of a fine-tuned Earth, see Rare Earth hypothesis. Part of a series on Physical cosmology Big Bang · Universe Age of the universe Chronology of the universe Early universe Inflation · Nucleosynthesis Backgrounds Gravitational wave ...
Some other multiverse concepts include twin-world models, cyclic theories, M-theory, and black-hole cosmology. The anthropic principle suggests that the existence of a multitude of universes, each with different physical laws, could explain the asserted appearance of fine-tuning of our own universe for conscious life. The weak anthropic ...
Ours must be one of these, and so the observed fine tuning should be no cause for wonder. Although philosophers have discussed related concepts for centuries, in the early 1970s the only genuine physical theory yielding a multiverse of sorts was the many-worlds interpretation of quantum mechanics. This would allow variation in initial ...
An example of a fine-tuning problem considered by the scientific community to have a plausible "natural" solution is the cosmological flatness problem, which is solved if inflationary theory is correct: inflation forces the universe to become very flat, answering the question of why the universe is today observed to be flat to such a high degree.
Robin Collins argues that the universe is fine-tuned for scientific discoverability, and that this fine-tuning cannot be explained by the multiverse hypothesis. [97] According to Collins, the universe's laws, fundamental parameters, and initial conditions must be just right for the universe to be as discoverable as ours.
Similar to Einstein's original interpretation, the Lorentzian view describes a 3-dimensional universe existing through time, with objects in motion demonstrating time dilation and length contraction. However, these relativistic distortions occur relative to a privileged rest frame (an absolute frame of reference for the universe) rather than ...
It goes until about 5:30 p.m., and is followed by more fine-tuning. “We usually work through dinner,” Broecker says. Then it’s time for dress rehearsal at 8 p.m. with a full audience in studio.
[3] In the version as originally proposed by Pathria and Good, and studied more recently by, among others, Nikodem Popławski , [ 4 ] the observable universe is the interior of a black hole existing as one of possibly many inside a larger parent universe , or multiverse .