<ul><li>The most powerful cosmic rays may come from heavy dark matter particles annihilating themselves near Earth.</li><li>Cosmic rays are high-energy particles largely made of protons or nuclei of heavy elements.</li><li>The origins of most cosmic rays are known, but the origins of the most powerful ones are still not fully understood.</li><li>A recent paper proposes that the most powerful cosmic rays originate from an exotic form of dark matter called scalarons.</li></ul>

Most powerful cosmic rays in the universe start shockingly close to Earth, paper claims

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