Scientists now find that the world’s largest living lizard species, the Komodo dragon, most likely evolved in Australia and dispersed westward to its current home in Indonesia.
In the past, researchers had suggested the Komodo dragon (Varanus komodoensis) developed from a smaller ancestor isolated on the Indonesian islands, evolving its large size as a response to lack of competition from other predators or as a specialist hunter of pygmy elephants known as Stegodon.
However, over the past three years, an international team of scientists unearthed numerous fossils from eastern Australia dated from 300,000 years ago to roughly 4 million years ago that they now know belong to the Komodo dragon.
"When we compared these fossils to the bones of present-day Komodo dragons, they were identical," said researcher Scott Hocknull, a vertebrate paleontologist at the Queensland Museum in Australia.
For the last 4 million years, Australia has been home to the world's largest lizards, including the 16-foot-long giant (5 meters) called Megalania, once the world's largest terrestrial lizard but which died out some 40,000 years ago.
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