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Technology

How does a cricket ball swing through the air like a guided missile?

Quick fact

Swing bowling works because the seam and surface roughness create asymmetric air pressure, forcing the ball to deviate toward the smooth side at speeds above 70 mph.

Why this is interesting

A cricket ball can curve more than a meter sideways in flight—but only if one side is shiny and the other is deliberately roughened by the fielding team.