【明報專訊】Ancient climate research shows that we evolved during the most volatile (動盪的) era since the extinction of the dinosaurs. Like all other kinds of human species that once inhabited our world, we should have died away. Instead, our species survived, mastered the oceans, and eventually colonised Australia, the South Pacific, and the Americas. New discoveries in ancient DNA research are changing our understanding of the earliest sea voyages, from Easter Island to the Bering Strait (白令海峽).