The universe is full of mysterious phenomena, and one of the enduring puzzles has been the origin of high-energy cosmic particles. These particles, often originating from distant galaxies, carry immense amounts of energy, but their source has remained elusive. However, a recent study suggests that hydrogen recombination, a process that occurs in the early stages of the universe’s expansion, could be the missing piece of the puzzle. By delving into the intricacies of hydrogen recombination, researchers hope to gain new insights into the nature of these enigmatic particles and unlock the secrets of the universe’s most powerful forces. Could hydrogen recombination provide the plausible explanation we’ve been seeking for high-energy cosmic particles? The quest for answers continues.

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source: Phys.org