Currently, there are two theories about the initial peopling of Taiwan. The first claims that they were hunter-gatherers from the eastern part of the Asian continent; they gradually migrated to the island as they pursued the animals and plants that spread to Taiwan when the sea level was much lower during the last Ice Age. The second theory involves fishermen from Southeast Asia who migrated northward to Taiwan, following their fishing routes. Since current archaeological evidence is inconclusive, both theories remain plausible.