Most videos of a simple technique to treat vertigo are spot on, a study finds. July 24, 2012— -- How to wrap a cat for Christmas. How to make an origami boomerang. How to zombie-proof your car.

Qiang has shared his passion for origami with his students. "One day I showed an origami boomerang to my class, which aroused great interest among the students," Qiang said. "I began to show them ...