If you live in a neighborhood where most of the homes look pretty much the same, you might be living in a sea of red brick or grey brick or white painted wood. Imagine if that monotone sameness was ...

One new idea for every day in 2011. We’re talking big, small, local, international, in action, and on the drawing board. Here’s today’s — what’s yours? 1937 Underwood Standard typewriter. The painter, ...

Graph colouring is a fundamental problem in both theoretical and applied combinatorics, with significant implications for computer science, operational research and network theory. At its essence, ...