In our efforts to keep our brains healthy, how do we know what is working? Helen Thomson explores a new generation of tests that can reveal whether our efforts are paying off ...

What makes a good public school—and how would we know it? While these questions may appear simple to answer—given all the publicly available data and the growing number of online school-rating ...

Animal-welfare science tries to get inside the minds of a huge range of species — in order to help improve their lives. Credit...Photo Illustration by Zachary Scott Supported by By Bill Wasik and ...