A thin watery layer on ice's surface makes it slick, but the exact reason for this layer's formation remains unclear despite centuries of scientific inquiry. This longstanding puzzle continues to intrigue researchers in materials science. The explanation highlights the complexities of everyday phenomena like weather and water behavior.
For generations, scientists have theorized about the slipperiness of ice, yet a definitive answer eludes them. The key factor appears to be a thin, watery coating on the ice's surface, which reduces friction and causes the slick sensation underfoot or on skates.
Despite extensive study, the precise mechanism behind this quasi-liquid layer is not fully understood. Theories have abounded over the centuries, but none fully explain why it forms at temperatures where ice should remain solid. This mystery touches on broader questions in physics and chemistry, particularly how water behaves at interfaces.
The topic gained renewed attention through an article in Quanta Magazine, republished by WIRED on January 25, 2026. As noted in the piece, the slippery nature of ice affects everything from winter safety to sports, underscoring the practical implications of unresolved scientific questions.
Researchers continue to explore this phenomenon using advanced tools in materials science, hoping to clarify the molecular interactions at play. Until then, the watery layer remains a slippery concept in both literal and figurative senses.