For those who have wrestled a bulky couch around a tight corner and lamented, “Will this ever get through?” mathematicians have heard your pleas. Geometry’s “moving sofa problem” asks for the largest ...

Snapchat has long had the ability to help solve math problems, but now the feature is front and center. “It’s all about making the camera feel more magical,” said Eva Zhan of Snap. Snapchat Just open ...