Ira Block/National GeographicSome scientists say this skull, smaller than those of modern humans, is from a newfound species. Not all scientists agree that the 18,000-year-old "little people" fossils found on the Indonesian island of Flores should be designated an extinct human-related species. Some expressed their opposition in news interviews and informal symposiums, but papers arguing their case were rejected by major journals. snip... In today's issue of the journal Science, researchers led by Robert D. Martin of the Field Museum in Chicago present evidence they say supports their main argument, that the skull in question is not that of...