Koala dominant. Older males usually have accumulated scratches, scars, and cuts on the exposed parts of their noses and on their eyelids. The koala's gestation period lasts 33–35 days, and a female gives birth to a single joey (although twins occur on occasion). As with all marsupials, the young are born while at the embryonic stage, weighing only . However, they have relatively well-developed lips, forelimbs, and shoulders, as well as functioning respiratory, digestive, and urinary systems. The joey crawls into its mother's pouch to continue the rest of its development. Unlike most other marsupials, the koala does not clean her
Giant koala giant koala was in fact a folivore. Fossil remains of "P. stirtoni" have been discovered in Lake Eyre and Tarkarooloo basins in South Australia. It was once thought that the modern-day koala was descended from the giant koala, but this is now determined to be incorrect. Gilbert Price, of the University of Queensland, used improved dating techniques to analyze fossils of both types of koala to find that the two species were living together in the same arboreal niche. Which raises the question from what did the koala descend from and why one species of koala survived and the giant