diff --git a/geometry/skull/possible_geometries.txt b/geometry/skull/possible_geometries.txt
new file mode 100644
index 0000000..5ec6b3a
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+++ b/geometry/skull/possible_geometries.txt
@@ -0,0 +1 @@
+1. http://www.informatik.uni-konstanz.de/fileadmin/informatik/ag-saupe/Webpages/projects/scanning/david/humanskull.html