The four-color problem is simple to explain, but its complex proof continues to be both celebrated and despised. Click to tell Google to prioritize Quanta and see more of the best coverage of science ...

The theory of coloring deals with the problem of labeling parts of a graph to comply with certain rules and avoid specific conflicts. For example, imagine you wanted to color each dot below so that ...

Have you ever tried to do the brainteaser below, where you have to connect the dots to make the outline of a house in one continuous stroke without going back over your lines? Or perhaps you've ...