A map showing a continental shelf in northwestern Australia, denoting areas — including an archipelago — that would have been above sea level between 70-61,000 years ago.
During lower sea levels, a vast archipelago formed on the Australian northwest coast, the scientists said.
  • 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.