Dark Matter May Consist of Black Holes From a Previous Universe
A new theoretical model proposes that dark matter, which constitutes approximately 85 percent of the universe's matter, may be composed of primordial black holes surviving from a previous cosmic cycle. Published in Physical Review D by Enrique Gaztanaga, a research professor at the Institute of Space Sciences in Barcelona, the study challenges the standard Big Bang singularity theory. Instead, it supports a cyclic universe model where the cosmos expands, contracts, and rebounds endlessly. Gaztanaga argues that structures larger than 90 meters could withstand the final collapse of a universe and persist into the next. These relic black holes would have existed before the current universe began, potentially explaining both the origin of dark matter and the formation of early giant structures. This hypothesis offers an alternative to the long-standing search for exotic dark matter particles, which has yielded no direct detections despite decades of experimentation. While the model provides a compelling mechanism for the existence of primordial black holes, Gaztanaga emphasizes that further empirical testing is required. Future validation will depend on data from gravitational-wave backgrounds, galaxy surveys, and precision measurements of the cosmic microwave background to confirm if these ancient relics truly shape the galaxies we observe today.
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Dark Matter May Consist of Black Holes From a Previous Universe
A new theoretical model proposes that dark matter, which constitutes approximately 85 percent of the universe's matter, may be composed of primordial black holes surviving from a previous cosmic cycle. Published in Physical Review D by Enrique Gaztanaga, a research professor at the Institute of Space Sciences in Barcelona, the study challenges the standard Big Bang singularity theory. Instead, it supports a cyclic universe model where the cosmos expands, contracts, and rebounds endlessly. Gaztanaga argues that structures larger than 90 meters could withstand the final collapse of a universe and persist into the next. These relic black holes would have existed before the current universe began, potentially explaining both the origin of dark matter and the formation of early giant structures. This hypothesis offers an alternative to the long-standing search for exotic dark matter particles, which has yielded no direct detections despite decades of experimentation. While the model provides a compelling mechanism for the existence of primordial black holes, Gaztanaga emphasizes that further empirical testing is required. Future validation will depend on data from gravitational-wave backgrounds, galaxy surveys, and precision measurements of the cosmic microwave background to confirm if these ancient relics truly shape the galaxies we observe today.
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