Shadow bands, elusive rippling light and dark patterns, emerge fleetingly before and after eclipse totality, baffling scientists who strive to understand their origin and behavior.

Solar eclipse viewers often witness a phenomenon known as shadow bands just before and after totality. An upcoming eclipse offers a new chance to study this mystery.

Shadow bands, elusive rippling light and dark patterns, emerge fleetingly before and after eclipse totality, baffling scientists who strive to understand their origin and behavior.