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(Continuing coverage) Researchers at Montreal's Mcgill University are developing floor tiles that can simulate the look, sound and feel of walking on pebbles, grass or snow... "Floor surfaces are notable for the diverse roles that they play in our negotiation of everyday environments. Haptic communication via floor surfaces could enhance or enable many computer-supported activities that involve movement on foot," wrote researchers Yon Visell, Alvin Law and Jeremy R. Cooperstock.