It’s amazing that the core of curling is based on a physical anomaly that scientists have been unable to explain for 100 years. According to physics, if you spin, say, a regular glass and push it forward, friction should make it roll in the opposite direction of the spin. But the 20 kg granite curling stone defies these rules throughout its entire existence — it curves in the same direction it rotates. Either the stone leaves microscopic scratches on the ice, upon which its rear part then “jumps,” or the ice clings to it like teeth on a comb – there are many hypotheses, but clarity is nil.
There’s an interesting story in curling called “Broomgate.” In 2015, brooms with such aggressive directional fabric were released that sweepers could literally “steer” the stone like a joystick. Chaos ensued, and players from top teams (!) agreed not to use this then-legal hack out of gentlemanly honor. The federation tested 50 brooms and officially banned these “technological doping” tools. In 2024–25, “Broomgate 2.0” erupted. The controversy was not over the bristles, but the stiffness of the foam under the pad. Right during the Grand Slam of Curling (2025), top teams rebelled and signed a collective agreement to abandon these innovations mid-season. From June 2025, stiffer foams were banned — models like the BalancePlus Firm 2.0 were specifically targeted.
The photo shows curling in 1959 at Loch Leven, Kinross, Scotland.
Hi, I'm Rauf Aliev. 