Where Do Camels Belong?: Why Invasive Species Aren't All Bad

Where do camels belong? In the Arab world is the obvious answer. But they are relative newcomers there. They evolved and lived for tens of millions of years in North America, while today they retain their greatest diversity in South America and have their only wild populations in Australia. This is a classic example of the problems that underlie the issues of natural and invasive species, a hot issue right now, as the flip side of biodiversity. But do we need to fear invaders? And indeed, c...