diff --git a/site/index.md b/site/index.md
index 8bcc3e2..3307e40 100644
--- a/site/index.md
+++ b/site/index.md
@@ -2,4 +2,12 @@
 
 This is the personal website of [Niels G. W. Serup](/about/niels).
 
-Visit the subpages.
+**Here's a riddle:**
+
+- What's the difference between a person *X* who studies the [279 Thule
+asteroid](https://en.wikipedia.org/wiki/279_Thule) and a person *Y* who
+destroys it?
+
+- X is thoughtful.  Y just fought Thule.
+
+**(It's a pun.)**