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
For the World Is Hollow and I Have Touched the Sky For the World Is Hollow and I Have Touched the Sky "For the World is Hollow and I Have Touched the Sky" is the eighth episode of the of the American science fiction television series "". It was aired by NBC on November 8, 1968 and was written by Rik Vollaerts, and directed by Tony Leader. In the episode, the crew of the "Enterprise" rush to stop an asteroid from colliding with a Federation world, but discover the asteroid is actually an inhabited generation ship. The Federation starship "Enterprise" is targeted by nuclear missiles. The primitive weapons are destroyed, and