Back in the day, we used chalk to draw on the sidewalk or do math in the classroom. And while schools have moved past blackboards, those old sticks of chalk are still incredibly useful. Sure, you can ...

If you’ve ever seen someone chalk up before a big deadlift, maybe clapping a big cloud of the stuff into the air, you might wonder if it’s actually even doing anything. But chalk is a useful tool if ...

PARIS — When the gymnastics world championships went to Tokyo in 2011, German gymnast Fabian Hambuechen and his father, Wolfgang, saw it as a rare opportunity to stock up. They cut out the interior ...