The real question is why are you using answers it might be false information.
The platypus has changed very little over the years. Fossil evidence shows that earlier platypuses were larger, and had teeth. Apart from that, there have been no significant changes.
its australian
There are over 60 soecies of kangaroos.The species name for the platypus is Ornithorynchus anatinus.
yes it has changed over many years
Because people's interest has changed over the years.
Wave rock has changed over the years because it has changed colour
has hats changed over the years
None.
Computers have changed in many ways over the years. Technology has advanced< and it has become more easy to do stuff!
it changed by... well it changed... It just changed!
The actors over the years have changed
The platypus is found only in Australia. However, both species of echidna are found in New Guinea. The long-beaked echidna is found in New Guinea but not Australia, while the short-beaked echidna is found in a small corner of Papua New Guinea, but all over the Australian continent.