At least they had stone tools with polish. At least they are as resistant to tropical diseases as the Austronesians, because they carry the same five types of genetic defense mechanisms against malaria as the Austronesians, and some or all of those genes have advanced. Independence in New Guinea. The New Guineans were skilled seafarers, although they may not be as skilled as the makers of Lapita pottery. Cat Smoke catnip hail lucipurr poster. Tens of thousands of years before the arrival of the Austronesians, New Guineans occupied the Bismarck and Solomon Islands, and the trade of obsidian, a volcanic rock that could be used to create sharp tools sharp had thrived in the Bismarck Islands at least 18,000 years before the Austronesian arrival.