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There are people living on the island, and the iguanas are not afraid of them, in fact, quite the opposite.
岛上有人居住，巨蜥并不害怕他们，事实上恰恰相反。
It follows the scent of my barbecue.
它循着我烤肉的香味而来。
Over the last few years, these animals have adapted their behaviour to get used to the presence of man and use man as the potential food source.
过去的数年中，这些动物行为发生了改变，适应了人类的存在，将人类作为一种潜在食物来源。
This ability to learn and change as the environment around you changes is a very neat evolutionary trick.
这种随周围环境变化而学习和变化的能力是非常理想的进化策略。
It used to hunting invertebrates.
它从前以无脊椎动物为食，
It changes the behaviour to home in on this appealingly cooked barbecue sausage.
现在则改变食谱定位到这根烤得很烂的香肠。
And in modern world when man's encroached on virtually every habitat.
在现代世界里，人类正在侵犯着每一块栖息地。
It's a very good way of ensuring your survival.
这种行为上的适应性改变很适宜生存。
And the adaptability has enable the reptile with the more chilling interest in people.
而适应性更让一种对人类有更骇人兴趣的爬行动物在这片水域兴旺繁衍。
