Science is a participatory endeavour. When people from diverse backgrounds come together in the spirit of open-minded inquiry, great discoveries can be made. Yet it's not always clear where or when those breakthroughs will come.
There is mounting evidence that some of today’s most promising avenues of inquiry in physics lie not within specialties, but between them. This issue of Inside the Perimeter introduces some of those intersections, and explores the potential rewards that can come from understanding the places between.