"Ice-skaters skate on water, not ice. At 32 degrees Fahrenheit, ice has a liquid surface measuring 1.5 millionths of an inch. Below -31 degrees Fahrenheit, the liquid layer becomes so thin that a skater's blades would stick rather than glide across the ice."
Wow. That's just weird!
"The average lifespan of an NHL hockey puck is seven minutes. Those that don't fly into the stands are removed because they warm up from friction and bounce on the ice. Game pucks--chilled to -10 degrees Fahrenheit for maximum performance--are kept in a freezer in the penalty box."
That's another thing I never knew! Or really thought about!!