Physics
What makes curling a perfect blend of physics and strategy?
Quick fact
Vigorous sweeping heats the ice just enough to melt its top layer, reducing friction and letting the stone travel up to 12 feet farther while curving less.
Why this is interesting
Sweeping a curling stone's path doesn't just clear frost—it melts a microscopic layer of ice to create a water film that acts as a steering wheel for a 44-pound rock.