The yellow golf ball, though, is the key to all of this. Jarvis says it's a visual of your center, as you get setup and swing. "The yellow ball represents your center mass," Jarvis explains.

If you've been watching Couples' run at Augusta the past few years, you may have noticed something that differentiates him from the rest of the field: He uses a yellow golf ball. The reason for t ...

Here are the official requirements of a regulation softball, as noted in Rule 3.2.1 of the NCAA's softball rulebook: "The ball shall be an optic yellow sphere with raised red thread seams.

But out on tour, and also around the amateur game, we see so few balls that aren’t white. For whatever reason we only play a yellow ball when we’ve lost our others or been given a sleeve of something ...

were protected by a large yellow pendulum at the building’s center that helped absorb the shock. Known as a “tuned mass damper,” the 730-ton steel sphere is suspended between several floors ...