Scientists in Australia have found a new species of hobbit-sized humans who lived about 18,000 years ago on an Indonesian island in a discovery that adds another piece to the complex puzzle of human evolution. The partial skeleton of Homo floresiensis, found in a cave on the island of Flores, is of an adult female that was a metre (3 feet) tall, had a chimpanzee-sized brain and was substantially different from modern humans. It shared the isolated island to the east of Java with miniature elephants and Komodo dragons. The creature walked upright, probably evolved into its dwarf size because...