Jumping giants: Fossils show giant prehistoric kangaroos could hop unimelb.edu.auKangaroos’ giant ancestor probably able to hop despite 250kg weight, scientists say The GuardianBiomechanical limits of hopping in the hindlimbs of giant extinct kangaroos | Scientific Reports NatureAncient, giant kangaroo was likely hopping in Australia 50,000 years ago, researchers say ABC NewsScientists May Have Been Wrong About Giant Kangaroos SciTechDaily