The Invisible LINE That No Animal, Bird or Fish Can Cross
The Invisible LINE That No Animal, Bird or Fish Can Cross
It was 1859, a 36-year-old man from Wales with his limited education suddenly became a key figure in biology. He discovered something you cannot see, you cannot hear, or even touch but it’s extremely important for studying biology and biodiversity in the world.
This is merely an imaginary line passing between two Indonesian islands. If you stand on Bali's coast and look east at Lombok, you'll see a narrow 32 km stretch of water that looks nothing special.
But if you look closely, on the western side of the line, the wildlife is typical of Asia, including species like rhinos, elephants, and tigers. The moment you cross the line to the eastern islands, you find a different mix of animals, such as marsupials, Komodo dragons, and cockatoos.
This is known as a biogeographic boundary called the Wallace Line, which marks the meeting point of two regions rich in biodiversity. And this invisible barrier runs through the Malay Archipelago, the largest group of islands in the world.
How did this invisible line come to be? Why does it affect where species live? How did that man figure out its location? Let's find out the answers to these questions in this video.
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