Science Quickly The surprising enigma of slippery ice
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Feb 20, 2026 Paulina Rowińska, science journalist who explains competing theories. Daniel Bonn, physics professor who measures ice friction and skating implications. Martin Müser, theoretical physicist who studies surface disorder and proposed the amorphous-layer idea. They discuss pressure-melting limits, frictional heating across temperatures, thin pre-melt layers, and a new amorphization hypothesis as a possible slipperiness winner.
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Skating Scene Sparks the Question
- Kendra Pierre-Lewis describes ice skating in Lower Manhattan and links it to Winter Olympic sports.
- She uses this scene to introduce why scientists still debate why ice is slippery.
Pressure Hypothesis Falls Short
- Pressure alone cannot explain ice slipperiness because you'd need enormous loads to melt ice by pressure alone.
- Daniel Bonn shows humans lack the weight to cause such melting, so pressure is an incomplete explanation.
Frictional Heating Explains Some, Not All
- Frictional heating can melt ice and lower friction, but only after motion begins and only within a temperature window.
- Daniel Bonn's experiments found lowest friction near −7°C and higher friction when ice gets too warm and mushy.