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

Cosmic rays are high-energy particles that constantly stream through the cosmos.

They are largely made of protons, but they can occasionally be made of the nuclei of heavy elements.

A Russian astrophysicist proposes that the most powerful cosmic rays originate from an exotic form of dark matter.

This dark matter particle would have been created in the earliest moments of cosmic history.