We're on a quest to unravel the mystery that is the caves beneath Australia's Nullarbor desert. Subscribe to ABC Science YouTube 👉 https://ab.co/2YFO4Go

Unique in the world, these are big labyrinthine salt water-filled caves, up to 90 metres below the flat, dry desert surface and extending for kilometres underground. Geologists believe that the Nullabor has been mostly dry since it emerged from the sea 15 million years ago. So are the caves relics of a bygone era, or are the processes that formed them still at work?


---------------------------------------------------------------
This is an official Australian Broadcasting Corporation YouTube channel
Contributions may be removed if they violate ABC's Online Conditions of Use http://www.abc.net.au/conditions.htm (Section 3).