diff --git a/capra course.md b/capra course.md
index f4b7a9410..bc7854acd 100644
--- a/capra course.md	
+++ b/capra course.md	
@@ -95,5 +95,8 @@
 					- [[reflective consciousness]]
 					- [[tool making]]
 					- [[social]]
-				-
+			- [[homo habilis]] [[two million years ago]]
+			- [[homo erectus]]
+			- [[homo sapiens]]
+				- [[cro magnons]] -- anatomically identical to us. fully developed [[language]].
 	- [[lecture 5]]
\ No newline at end of file