Extinct since the mid 20th century, the pig-footed bandicoot was a small, mostly herbivorous marsupial of the plains of inland Australia. About the size of a kitten, the pig-footed bandicoot had large, pointed ears, a long tail, long, slender limbs, and, as its name suggests, hoof-like nails on its forefeet and hind legs, making it unique among marsupials. Though its decline coincided with the arrival of Europeans, the cause of its extinction remains uncertain. What are some theories? Discuss