Paleontological studies show that modern avian groups probably first appeared in the Paleocene and experienced an explosiveradiation in the early Cenozoic.
古生物学研究表明,现生鸟类的最早出现是在古新世,而爆发性辐射演化发生在新生代早期。
3
The various radiation phenomena in solar flare show that great number of energetic electrons can be created in such explosive events.