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University of Pennsylvania: Why are Icy Surfaces Slippery?
January 25, 2026
PHILADELPHIA, Pennsylvania, Jan. 25 -- The University of Pennsylvania issued the following Q&A on Jan. 23, 2026, with Robert W. Carpick, John Henry Towne Professor of Mechanical Engineering and Applied Mechanics and Materials Science and Engineering in the School of Engineering and Applied Science:

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Why are icy surfaces slippery?

Winter Storm Fern brought icy and snowy conditions to the Northeast and other parts of the country over the weekend. Pen . . .

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