Radioactive energy.
The transfer of energy via radiation.
The shooting forth of anything from a point or surface, like diverging rays of light.
The process of radiating waves or particles.
A rapid diversification of an ancestral species into many new forms.
Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.