Palorchestes Size Comparison (IMAGE) PLOS Caption Ancient Australia was home to strange marsupial giants, some weighing over 1,000 kg. Credit Hazel Richards (2019) Usage Restrictions CC BY: Redistribution permitted with credit License Licensed 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.