The cachalot is a giant cetacean seen vary rarely, for they often dive to deep depths. They're also known as sperm whales after their spermaceti, a waxy substance in the whale's head cavity, which is considered valuable.
(ËkÉzmÉªk) adj. 1. (Astronomy) of or relating to the whole universe: cosmic laws. 2. (Astronomy) occurring or originating in outer space, esp as opposed to the vicinity of the earth, the solar system, or the local galaxy: cosmic rays. 3. immeasurably extended in space or time; vast.
Despite their name, cosmic rays are not a part of the electromagnetic spectrum. Instead of radiation, cosmic rays are high-energy charged particles that travel through space at nearly the speed of light. Their extremely high energies are comparable to those of gamma rays at the upper end of the electromagnetic spectrum.