Rodents of Unusual Size?
Giant rat found in 'lost world'
A giant rodent five times the size of a common rat has been discovered in the mountainous jungles of New Guinea.
The 1.4kg Mallomys giant rat is one of two species of mammal thought to be new to science documented on an expedition to an area described as a "lost world".
Conservationists also found a pygmy possum - one of the world's smallest marsupials - on the trip to the remote north of Papua province, Indonesia.
Both are currently being studied to establish whether they are new species.