Part 6/11:

To understand the Wallace Line's origins, one must venture into the distant past of Earth's geological evolution. Millions of years ago, the world's continents formed a massive supercontinent known as Pangaea. As tectonic plates shifted, Pangaea fractured, rearranging landmasses and creating barriers that drastically affected species migration. The development of new oceans and mountain ranges established impassable barriers for many species.