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Why is ketchup so hard to pour? - George Zaidan

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Published on Apr 8, 2014

View full lesson: http://ed.ted.com/lessons/why-is-ketc...

Ever go to pour ketchup on your fries...and nothing comes out? Or the opposite happens, and your plate is suddenly swimming in a sea of red? George Zaidan describes the physics behind this frustrating phenomenon, explaining how ketchup and other non-Newtonian fluids can suddenly transition from solid to liquid and back again.

Lesson by George Zaidan, animation by TOGETHER.

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