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Why do a few big ice cubes seem to melt more slowly than many smaller cubes?

Why do a few big ice cubes seem to melt more slowly than many smaller cubes? asks a reader.

If the ice in your drive-through drink disappears on the short trip home, don’t blame the kid who filled your cup. Some of that crushed ice had vanished before your drink even settled into the cup [...]

How come your reflection in the bowl of a spoon is upside down?

How come your reflection in the bowl of a spoon is upside down? asks reader Matthew Wiegert.

An ordinary mirror is made by coating one surface of a piece of glass with a thin layer of metal, like silver or aluminum. It’s this shiny metal that reflects your image. So a shiny, scratch-free metal spoon, [...]