Why a drop of liquid makes a splash - When a drop of liquid falls, a microscopically thin layer of air prevents it from spreading smoothly across a surface. The drop can’t push aside the air layer. In instead of wetting the surface, parts of the liquid fly off, causing a splash.

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Why a drop of liquid makes a splash - When a drop of liquid falls, a microscopically thin layer of air prevents it from spreading smoothly across a surface. The drop can’t push aside the air layer. In instead of wetting the surface, parts of the liquid fly off, causing a splash.