Cosmic ray
From Tardis Wiki, the free Doctor Who reference
Cosmic rays were radiation emanating from space.
Dr Tyler was a scientist who researched cosmic rays. (TV: The Three Doctors)
The Saurians used cosmic rays as weapons in their war with humanity. (PROSE: Lords of the Galaxy)
Intelligent cosmic rays took over the Earth in an alternate timeline created by the Chronomasticon. (PROSE: Playing for Time)
