diff --git a/content/blog/2025/thirty-seven/eta-bootes.png b/content/blog/2025/thirty-seven/eta-bootes.png
new file mode 100644
index 0000000..747d1d9
Binary files /dev/null and b/content/blog/2025/thirty-seven/eta-bootes.png differ
diff --git a/content/blog/2025/thirty-seven/index.md b/content/blog/2025/thirty-seven/index.md
new file mode 100644
index 0000000..b8e05e6
--- /dev/null
+++ b/content/blog/2025/thirty-seven/index.md
@@ -0,0 +1,63 @@
+---
+title: "Thirty Seven"
+date: 2025-01-14
+resources:
+  - name: eta-bootes
+    src: eta-bootes.png
+    title: >
+      Eta Boötes, indicated by the target reticle. Screenshot of Stellarium, an
+      open source planetarium package.
+  - name: ngc2169
+    src: ngc2169.jpg
+    title: >
+      NGC 2169.
+      Taken by <a href="https://www.instagram.com/buenosaires_skies/">Sergio Eguivar</a>.
+    params:
+      source:
+        url: https://apod.nasa.gov/apod/ap240514.html
+tags:
+  - Me
+  - Birthdays
+---
+
+Today is my birthday! :partying_face:
+
+[37][wp37] is prime, and also _sexy_ prime. It has the interesting property of
+being the number most likely offered when you ask someone to pick a number
+between 1 and 100[^1]. Thirty seven is neat!
+
+---
+
+Dennis is 37. He's not old!
+
+{{< youtube R7qT-C-0ajI >}}
+
+---
+
+{{< 2col >}} 
+{{< figures/image name=eta-bootes >}}
+{{< figures/image name=ngc2169 >}}
+{{< /2col >}}
+
+Eta Boötes, 37 lightyears away, is now in my [light cone][lightcone]. [NGC
+2169][ngc2169] is an open star cluster in Orion that looks remarkably like the
+number 37.
+
+---
+
+[thirty-seven.org](http://thirty-seven.org) is a website dedicated to the
+collection of artifacts marked with the number 37.
+
+---
+
+This Veritasium video is a cool roundup of the interesting things about 37.
+
+{{< youtube d6iQrh2TK98 >}}
+
+
+[^1]: When you control for 69 and 42, which have certain culteral significance.
+
+[wp37]: https://en.wikipedia.org/wiki/37_(number)
+[lightcone]: https://en.wikipedia.org/wiki/Light_cone
+[ngc2169]: https://en.wikipedia.org/wiki/NGC_2169
+[apod-ngc2169]: https://apod.nasa.gov/apod/ap240514.html
diff --git a/content/blog/2025/thirty-seven/ngc2169.jpg b/content/blog/2025/thirty-seven/ngc2169.jpg
new file mode 100644
index 0000000..1fe40ea
--- /dev/null
+++ b/content/blog/2025/thirty-seven/ngc2169.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f8faa5bd6c104102b50d8aff0c1057ea31a1e1cc35c06fe5efb4a9b091adf1f8
+size 411676