We are talking artifacts that are maybe 500 years old, not millions of years, which was when Australia was part of Gondwanaland.

I assume you are joking, but India was actually smooshed up against Australia back in Pangea 335m years ago: https://en.wikipedia.org/wiki/Pangaea#/media/File:Pangaea_co...

Actually continental drift explains a variety of phenomena that have been falsely attributed to human exploration: English is spoken in New York, for example, because the british isles used to be connected to New England. Even the names reflect this: when the landmasses separated Queen Victoria proudly viewed them as a geological projection of the British sphere of influence and christened her new islands "New England" "New York", "New Hampshire" etc.

Dunno if trolling or actually serious...