diff --git a/planet-hopf.md b/planet-hopf.md
index 4bcdd4600..41bddb35a 100644
--- a/planet-hopf.md
+++ b/planet-hopf.md
@@ -2,9 +2,14 @@
 
 - an [[object]] in [[gauge theory]]
   - [[go]] http://www.math.toronto.edu/~drorbn/Gallery/KnottedObjects/PlanetHopf/
+  - [[yt]] https://www.youtube.com/watch?v=2xiEEtoa-_4
+  - [[push]] [[eric weinstein explains gauge symmetry]]
   - [[eric weinstein]]
     - with [[joe rogan]]
+    - [[gauge symmetry]]
     - "[[curvature]] in this context is the [[escherness]] of a [[system]]"
+    - [[aharonov bohm effect]]]] 
+    - the limits of linguistic thinking: there's something about [[gauge theory]] that makes it so that it's much easier/at all possible to understand via visual thinking
 
 https://twitter.com/O__C___D__/status/1380590675536797697