![](https://blogs.nicholas.duke.edu/water-and-peace/files/2016/03/IMG_6916.jpg)
Two weeks ago on a cool night in the desert, I wandered through mazes of sand and squinted up at some of the brightest stars I’d ever seen. These crazy aliens called “cacti” waved their stiff arms at me and I giggled every time I saw one that looked like a foot pouf.