Feb12
Koalas, like all marsupials except the North American opossum, are found only in Australia because they migrated there when the earth was one large land mass. Because Australia is an island, it is impossible for koalas to migrate to other continents. Find out more about koalas withinformation from a science teacher in this free video on animal habitats. Expert: Janice Creneti Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University. Filmmaker: Christopher Rokosz