What are Those Things on Airplanes' Wings?

The video discusses common flight discomforts and introduces the concept of drag, a force that airlines combat to save fuel. It explains how vortices contribute to drag and how engineers invented winglets to reduce it. Winglets, small upward-curving extensions at the wingtips, help decrease drag and improve fuel efficiency, saving airlines money. The video highlights the historical development of winglets and their widespread adoption in modern aviation.

What new insight or understanding did you gain from this video?