Why a World Cup Ball Has Grooves
A fast science explainer uses 3D geometry, sports footage and a smooth-ball reversal to answer a visual design mystery.
By @CleoAbram for CleoAbramRuns 01:02
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Why it works
The question becomes a visual comparison by 0:03, while a third disputed design opens another loop at 0:06.5. Three geometry steps between 0:12 and 0:29 make the construction understandable; the 0:39 reversal turns an apparently ideal smooth surface into an airflow problem, then macro groove footage at 0:53–0:58 resolves the hook. The 0:09.3 replay peak meets the flat-to-sphere puzzle.
Films like this
Tagged live actionverticalscience explainertalking headmotion graphics3d geometryobject comparisonmacro close-up
