Hey Dwayne @dillenbata3 ,
As far as I know, a UV Map, maps each Face Corner to a point on the 2 dimensional UV plane. When you start With a Circle, there are no Faces and therefor no Face Corner. There is however a UV Map created. This is what you might call an Empty UV Map. (Usually Meshes are 2 dimensional, but a circle is 1 dimensional, which gives it an exceptional position.)
Interesting fact: once you start Extruding (the Circle) and thus making Faces, all new Face Corners will be mapped to (0, 0).
