A team of archaeologists and researchers from Indonesia’s National Research

A team of archaeologists and researchers from Indonesia’s National Research Centre for Archaeology and Griffith University, work in Leang Bulu’ Sipong 4 limestone cave in South Sulawesi, Indonesia December 4, 2019. Picture taken December 4, 2019. Courtesy of Indonesia’s National Research Centre for Archaeology/Griffith University/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. MANDATORY CREDIT