Add Yahoo as a preferred source to see more of our stories on Google. Do you remember hula hooping when you were a kid? It was so much fun it never seemed like 'exercise.' But to do it now? Really?

The Hula-Hoop is one of the most famous toys in history, but the science behind it has gotten little attention. Some of us are master twirlers, while others can't manage more than one spin. So how do ...

NPR's Juana Summers talks with Jessica Yung and Emily Kwong of Short Wave about the physics of hula hooping, why some vaccines last longer than others, and a few moon launches to watch for in 2025. It ...