There may be an ultraheavy explanation for the mystery surrounding the origins of the highest-energy particles ever observed.

Ultraheavy particle clue: Penn State-led research suggests some ultrahigh-energy cosmic rays are made of nuclei heavier than iron, altering theories on their origins. Record-breaking events: The 2021 ...

New cosmic ray clue: Penn State researchers propose ultraheavy atomic nuclei as a source of the highest-energy cosmic rays, challenging long-held assumptions. Rare particle events: The 2021 'Amaterasu ...

Cosmic rays traveling through space may provide enough energy to sustain life even in incredibly cold and dark environments, a new study suggests. The staggeringly energetic neutrino likely came from ...

Detection by Askaryan Radio Array holds promise for future research into sources, nature of cosmic rays and neutrinos ...