Part 2/9:
In the mid-19th century, the pioneering English zoologist Alfred Russel Wallace spent three years in this region, uncovering the significant biodiversity and the curious separation of species across the Malayan Archipelago. He identified a dividing line—the Wallace Line—that split fauna into distinct groups. Today, marine biologists are embarking on an expedition to further explore this division, seeking to uncover whether a similar separation exists underwater.