https://docs.blender.org/manual/en/latest/modeling/modifiers/normals/index.html
Normals - Blender 5.1 Manual
5 1normalsblendermanual
https://docs.blender.org/manual/en/latest/modeling/meshes/editing/face/extrude_faces_normal.html
Extrude Faces Along Normals - Blender 5.1 Manual
5 1facesalongnormalsblender
https://www.weather.gov/news/212304-citizen-science-climate
Legions of citizen scientists contributed to NOAA's new Climate Normals
citizen scientistslegionscontributednoaanew
https://issuetracker.unity3d.com/issues/blend-shape-normals-are-incorrect-for-fbx-files-when-normals-are-set-to-import-and-blend-shape-normals-are-set-to-calculate
Unity Issue Tracker - Blend Shape normals are incorrect for .fbx files when Normals are set to...
Unity calculates “deltaNormals[]” incorrectly when a mesh has imported normals and blend shapes, specifically with FBX-imported mode...
issue trackerunityblendshapenormals