Adaptive radiations commonly follow mass extinctions : following an extinction, many niches are left vacant. Source: Internet
Cosmic ray radiations striking the Earth from outer space were finally definitively recognized and proven to exist in 1912, as the scientist Victor Hess carried an electrometer to various altitudes in a free balloon flight. Source: Internet
Being above the atmosphere in particular and Earth's magnetic field gives access to the solar wind and infrared and ultraviolet radiations that cannot reach Earth's surface. Source: Internet
Electronic support measures gather intelligence through passive "listening" to electromagnetic radiations of military interest. Source: Internet
For most people, ultraviolet radiations from sunlight is the most common cause of skin cancer. Source: Internet
It has a very long half-life (1.53 million years), its decay emits only low energy radiations, and it is not considered as highly hazardous. Source: Internet