Australia used to be part of Gondwana, a huge landmass that also included India, South America, Africa and Antartica. When it began to break up 120 million years ago into separate continents, Australia became isolated for about 35 million years until it collided again with the Asian plate.
By this time a unique fauna had developed and majority of the animals found here evolved and became native to Australia.
Here are just some of the unique animals endemic to Australia.