Murids, as the rat family is known, are more taxonomically diverse than any other mammal group and are found in nearly every part of the world... The study was based on remains recovered from the limestone cave known as Liang Bua, where partial skeletons of H. floresiensis have been found, along with stone tools and the remains of animals -- most of them rats. In fact, out of the 275,000 animal bones identified in the cave so far, 80 percent of them are from rodents... The study encompassed about 10,000 of the Liang Bua rat bones. The remains spanned five...