Kasih Norman et al/Griffith University
- Researchers say a vast population once lived on a now-submerged continental shelf off of Australia.
- The land was submerged at the end of the last ice age, about 18,000 years ago.
- Researchers point to mounting evidence of human habitation there, before the waters rose.
A vast, now-submerged landmass off of Australia's coast may once have been capable of supporting up to half a million people, a new study suggests.