The leading explanation for why flags flap in the breeze has run afoul of new experimental findings. Huber, G. 2000. Swimming in Flatsea. Zhang, J., et al . 2000.
Answer blows in wind, swirls in soap.
Soap-film shots tell more about swirls. All rights reserved. Subscribe to Science News . Copyright Clearance Center Browse a Science News photo collection. Subscribe to Science News in spoken-word format.