Scientists have found "a striking predatory adaptation" in the reptile Komodo dragon: a layer of iron coating on its teeth, keeping its "serrated edges razor sharp."
In a paper published Wednesday, the scientists wrote that iron in the cutting edge and tips of the world's largest lizard species' teeth stain them orange.
The Komodo dragon has survived for millions of years thanks to a combination of biological and ecological factors. They have low energy demands and can adapt their size based on food availability. Their ability to eat a variety of prey and tolerate harsh environments helped. When modern humans arrived, new prey like pigs provided a crucial food source.