diff --git a/.obsidian/plugins/colored-tags/data.json b/.obsidian/plugins/colored-tags/data.json
index 8b268b065..d056fb57a 100755
--- a/.obsidian/plugins/colored-tags/data.json
+++ b/.obsidian/plugins/colored-tags/data.json
@@ -206,7 +206,8 @@
     "NVIM": 194,
     "Neo": 195,
     "subtask": 196,
-    "Personal": 197
+    "Personal": 197,
+    "MARVEL": 198
   },
   "_version": 3
 }
\ No newline at end of file
diff --git a/3-99 Research/MARVEL.md b/3-99 Research/MARVEL.md
index 2beec41d9..841a8a622 100644
--- a/3-99 Research/MARVEL.md	
+++ b/3-99 Research/MARVEL.md	
@@ -9,4 +9,7 @@ benefits from common knowledge being out there.
 
 MARVEL is a unique design that I haven't really seen before. First of all, coolant
 is by natural convection. This reactor system uses two coolant loops: the primary loop
-is sodium-potassium salt, while the secondary coolant is lead. 
+is sodium-potassium salt, while the secondary coolant is lead. These two fluids
+drive 'Stirling Engines', which are how the system generates power.
+
+- [?] What are Stirling Engines? #MARVEL 
diff --git a/900s Calendars/Research/2025-03-13 Research MARVEL stuff.md b/900s Calendars/Research/2025-03-13 Research MARVEL stuff.md
new file mode 100644
index 000000000..6ff518a9a
--- /dev/null
+++ b/900s Calendars/Research/2025-03-13 Research MARVEL stuff.md	
@@ -0,0 +1,8 @@
+---
+title: Research MARVEL stuff
+allDay: false
+startTime: 13:00
+endTime: 14:15
+date: 2025-03-13
+completed: null
+---