On Saturday night, I went to the birthday party of my friend Zita. It was actually a combined party for both Zita and her friend Sofia. There was an interesting mix of folks there, including graduate students from the same astronomy program in which Zita is studying, and Zita's friends from salsa dancing. By coincidence I also saw a colleague of mine there. I also met a charming biology Ph.D. student named Maria who lives in my neighborhood. It's a small world. Here are the photos from the party.