Although early visitors dismissed the Galapagos Islands as "useless," "hell," "so parch'd that [the islands] will not bear a man," and "the most dreary, barren, and desolate [place] I have ever beheld," today the islands are among the world's top destinations. Indeed, more than 170,000 tourists now visit Galapagos each year (Figure 1), despite the high cost of getting there and the archipelago'…