The next great innovation in golf balls apparently is going to be the hollow metal core. A company called Nanodynamics Innovations says that their hollow ball has less spin, and thus will help the average hacker keep the ball in the fairway, and moving in a straight line toward the hole.
I seem to remember reading about a hollow metal ball that was experimented with back in the 1970s. Perhaps someone can remember the name.
I remember cutting open wound balls as a kid (too smiley to play with) and some had a steel ball in the center of the cork.
Don’t remember which brand.