"When the rain lilies first appeared there, I wondered where they came from - whether their seeds were already in the soil, waiting to be turned close enough to the water and the sun, or whether they found their way to that spot once the earthmovers stopped moving. . . . Thousands of tiny miracles hiding in plain sight that give us windows into what the world we live in once was, and could be again, if in a different and compromised way. . . . When I learned how many seeds each one of those flowers produces, I realized that, as common as they are, they are not as common as they should be, holding out despite our near-obliteration of the habitat to which they evolved. And when I learned that they only respond to actual rain, not water from a sprinkler or hose, I had to wonder: How do they know?" - Christopher Brown, A Natural History of Empty Lots