. . and the heartâ belong to the sculptor, in which case the idea is that the sculptor âmockedâ (âmimicked,â âimitated in stoneâ) the passions and âfedâ them by creating them in stone, or if the hand and the heart belong to Ozymandias, whose hand mocked the passions of his foes and whose. heart fed his own passions.
Extinction is the complete demise of a species. It takes place when all individuals of a species die out. Extinction has occurred throughout the history of life on Earth. It is the ultimate fate of all species. In fact, it has been estimated that 99.9% of all species that have ever lived on Earth are now extinct.
1 Earth's largest extinction killed 57% of all families, 83% of all genera and 90% to 96% of all species (53% of marine families, 84% of marine genera, about 96% of all marine species and an estimated 70% of land species, including insects). 2  The highly successful marine arthropod, the trilobite became extinct.here is still debate about the causes of all mass extinctions. In general, large extinctions may result when a biosphere under long-term stress undergoes a short-term shock. An underlying mechanism appears to be present in the correlation of extinction and origination rates to diversity.