diff --git a/extra/bubble-chamber/bubble-chamber.factor b/extra/bubble-chamber/bubble-chamber.factor
index 292ac7e59f..d88c53c99f 100644
--- a/extra/bubble-chamber/bubble-chamber.factor
+++ b/extra/bubble-chamber/bubble-chamber.factor
@@ -18,6 +18,14 @@ USING: kernel syntax accessors sequences
 
 IN: bubble-chamber
 
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+! This is a Factor implementation of an art piece by Jared Tarbell:
+!
+!   http://complexification.net/gallery/machines/bubblechamber/
+!
+! Jared's version is written in Processing (Java)
+
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 ! processing
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!