Archaeologists in Australia have recorded hundreds of markings, known as finger flutings, lining the walls of a limestone ...

Before this, Australia’s deepest cave was Niggly, which happens to be next door to Delta Variant. It is just four meters shallower than Delta Variant and part of the same interconnected system.

Koonalda Cave was the first place in Australia with indigenous rock art that could be dated back 22,000 years — upending the scientific community’s understanding of Australian history.