How do diverse movies fare in the international box office? What time do trolls like to post their comments? We look back on some of this year's most intriguing graphs and maps.
Let's say you want the perfect mix of friends and strangers at your next party. Mathematicians have been working on a version of this problem for nearly a century, and the answer is complicated.
Teachers are starting to ditch graphing calculators for math apps. Was the expensive tech ever worth it – or is it just holding students back?