In 2021, scientists uncovered the untraceable cosmic ray Amaterasu, second only to the renowned Oh-My-God particle. Despite a remarkable energy burst, its origin remains a significant mystery, leading to advancements in cosmic ray research. A single particle over Utah pointed to a cosmic ray with no clear origin. Image credit - Gemini One of the strongest cosmic rays in history was detected in May of 2021 in Utah. Amaterasu hit Earth's atmosphere and caused a big shower of secondary par... [5203 chars]