The squeaking of sneakers on a gym floor is usually attributed to friction, specifically a stick-slip variety that involves cycles of sticking and sliding between two surfaces. But that model is best ...

Canadian kids are spending more time on screens and far less time playing—throwing a ball or jumping around—and that's creating a big public health problem. Not only are they missing out on better ...

Experts caution that low-quality, A.I.-generated videos on YouTube geared toward children often feature conflicting ...