Animal including salt water, hydrothermal vents, fresh water, hot springs, swamps, forests, pastures, deserts, air, and the interiors of animals, plants, fungi and rocks. Animals are however not particularly heat tolerant; very few of them can survive at constant temperatures above . Only very few species of animals (mostly nematodes) inhabit the most extreme cold deserts of continental Antarctica. The blue whale ("Balaenoptera musculus") is the largest animal that has ever lived, weighing up to 190 metric tonnes and measuring up to long. The largest extant terrestrial animal is the African bush elephant ("Loxodonta africana"), weighing up to 12.25 tonnes and
Downward to the Earth to seven Nildoror to make them help him repair flood damage. He encounters his old colleague Jeff Kurtz (an addict of Naggiar venom), who had undergone the rebirth ceremony only to be turned into something monstrous. Nevertheless, Gunderson dares to subject himself to the rebirth ceremony, which brings him a new understanding of the native creatures and new powers by which he can heal Kurtz and impart his new-found knowledge to others. Downward to the Earth Downward to the Earth is a 1970 science fiction novel by American writer Robert Silverberg. It is a tale of the quest for transcendence