Our world is filled with shapes and symbols that form familiar elements. One of those common geometric symbols is the circle. The circle plays a pivotal role in everyday life as tires on the cars we ...

You've sat in so many meetings where Microsoft PowerPoint presentations have revealed unexpected truths. The presenter makes you marvel as she shows how the circle marked "profit" overlaps with the ...

Each scandal is represented by a colored circle that encompasses the people who are implicated. As it's easy to see, many of the players here are mixed up in two, three, or more of the alleged crimes.

When I was in grade school, math teachers loved Venn diagrams, those overlapping circles that showed which elements different sets had in common. Talk to European officials, and each sketches some way ...