The first humans to arrive in Australia destroyed the pristine landscape...
&&
No, that can't be; only European settlers damaged the environment wherever they went. Indigenous people never hurt anything. /sarc
The same thing was said about North America when the humans got here 12,000 years ago.
Now that we've found 30-40,000 year old human foot prints in Mexico, what killed the large mammals off 12,000 year ago, huh?