diff --git a/2021-07-21.md b/2021-07-21.md
index 2904d5aae..e0486da56 100644
--- a/2021-07-21.md
+++ b/2021-07-21.md
@@ -1,3 +1,4 @@
 - [[richard feynman]]
 - [[michelson interferometer]]
-- [[aether]]
\ No newline at end of file
+- [[aether]]
+- [[effective altruism]]
\ No newline at end of file
diff --git a/aether.md b/aether.md
index 3876fde49..560244f4b 100644
--- a/aether.md
+++ b/aether.md
@@ -1,3 +1,5 @@
+- a [[thing]]
+	- [[medium]]
 - a [[tool]]
 	- [[site]] https://aether.app/
 	- [[go]] https://app.aether.app/