Old Gregg (IMAGE) Flinders University Caption Digging up the largest-known skeleton of Protemnodon viator, a specimen nicknamed ‘Old Gregg’ for its great size and very worn teeth, suggesting advanced age. The partial skeleton of a Diprotodon, an extinct giant marsupial, is in the foreground. Location is Tedford Locality, Lake Callabonna, northeast of the Flinders Ranges in South Australia. Credit Photo credit: Aaron B Camens, Flinders University (September 2018). Usage Restrictions Flinders University License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.