I’m a fan of the TV show Numbers. In tonight’s episode, the characters were discussing using a Venn diagram with an added fourth dimension-time. It hit me that as genealogists we can make use of Venn diagrams with this added dimension in connection with our studies of kinship theory. I’ve been using Venn diagrams [intersecting circles] to look at my families in a different way. And while I am lousy with solid geometry, I may attempt to construct a diagram that shows when those circles intersect. Something to think about anyway.