Why Are There No Big Animals In Australia. Unfortunately for us, australia isn’t entirely populated just by friendly locals, cool kangaroos, and cute koalas. For a long time, environmental factors such as higher oxygen content in the air and greater land masses (i.e., more space) were thought to contribute to their large size.
An illustration of the early australian marsupial, djarthia (lower right), which lived about 55 million years ago. Big cats like leopards and tigers usually attack humans when they’re sick or injured due to a human attacking them, he said. There are 55 different species of kangaroos.
In terrestrial zoology, the megafauna (from greek μέγας megas large and new latin fauna animal life) comprises the large or giant animals of an area, habitat, or geological period.
Peter schouten) then, there's a big gap in the australian fossil. A koala is not a bear. For a long time, environmental factors such as higher oxygen content in the air and greater land masses (i.e., more space) were thought to contribute to their large size. 50% of the birds in australia are unique.
