These engaging activities can help students visualize and manipulate the relationships between objects in space—skills that carry across multiple disciplines.

Among the hundreds of core moves out there, including crunches, leg raises, and planks, the Russian twist often lands on most people’s “avoid at all costs” list. Maybe it’s because it looks easy until ...

An analysis of clam shells suggests the North Atlantic subpolar gyre has had two periods of destabilization over the past 150 years: one around 1920 and the other from 1950 through present.