Remains of Earth's largest rat discovered in cave The remains of the largest rat to ever roam the Earth have been discovered in a remote cave in East Timor. Bonnie Malkin in Sydney Published: 12:35PM BST 26 Jul 2010 The huge rodent, which died out about 2,000 years ago, was three times as big as its modern cousins and weighed more than 13lbs, about the same as a small dog. Australian archaeologists from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) found the bones of the giant rat alongside 11 new species of rat, eight of which weighed more than...