Test your observation skills with a social media hit "spot the difference" puzzle featuring a grandmother and granddaughter.

Stamey, Will, Sriram Somanchi, and Edward McFowland III. "Difference-in-Differences Subset Scan." Proceedings of the ACM SIGKDD Conference on Knowledge Discovery and Data Mining 31st (2025): 2656–2667 ...

Americans increasingly only interact with Americans who look, think, and live like them. Even so, there are some places and moments across the country where diverse, meaningful, and transformative ...