to map out a newly discovered cave in Australia's deepest-known cave system. The cave was found by fellow caving group member Stephen Fordyce in January 2022 and named Delta Variant as a nod to ...

Chipping away to create indentations for basins, these pioneering cartographers then cut grooves into the cave floor to ...

No one knows how big the underside is. More than 365 miles of the five-level cave system have been mapped, and new caves are continually being discovered. Two layers of stone underlie Mammoth's ...