Nobody except the Aboriginal people knew kangaroos existed until about 200 years ago. The first Australian explorers and settlers saw them for the first time. The kangaroo, of course, has a pouch, and in Australia many main-mals have pouches. Australia and its neighboring islands ate where most of the punched animals have been found. Pouched animals form the order of mammals called “the marsupials”. This name comes from the Latin word marsupium, which means “pouch”.
The first mammals appeared more than 100,000,000 years ago, during the Age of Dinosaurs. Some of these were marsupial, and some were “placental”. Aplacental mammal supplies food to the unborn young within the mother’s body. In marsupial mammals, the pouch this purpose. The young are born very tiny and develop in the mother’s pouch. When the earth’s climate changed, the dinosaurs died out.
The mammals multiplied and developed in many ways. They became the ruling animals of the earth. But the placental mammals were more successful than the marsupials. Their brains were superior, and it was also for the young to develop inside the mother’s body than in a pouch. In most parts of the world, the marsupials disappeared. They could not compete for living places with the other mammals. But this did not happen in Australia and South America.
Scientists believe that Australia was once linked to South-Eastern Asia. This may have been with a chain of islands or an isthmus. So marsupials spread into Australia at a time when there were no advanced placental mammals there. They did not have any competition, so they flourished and evolved in many forms.
Why Are Kangaroos Only Found In Australia?
Australia has very different species to other continents because it became isolated from all the other continents 99 million years ago. Eventually, the Kangaroos evolved, unable to leave the continent. So this is why kangaroos only live (in the wild) in Australia.