The ancient bones and teeth of a previously unknown human relative — one that was even smaller than the so-called Hobbit — have been discovered deep in a cave on an island in the Philippines. The newfound species is named Homo luzonensis in honor of Luzon, the island where the mysterious beings lived during the late Pleistocene epoch, more than 50,000 years ago. At less than 4 feet (1.2 meters) tall, H. luzonensis is the second known dwarf human on record, the first being Homo floresiensis, also known as the Hobbit, whose remains were found on the Indonesian island of...