• Reading Levels 3 - 5

How do touchscreens really work?

During the winter of 2010, one South Korean sausage company saw a surprising jump in sales. Why? That year was particularly cold - so cold that Koreans would not take off their gloves to open their smartphones. Instead, they turned to snack sausages. In this TED-Ed video, Charles Wallace and Sajan Saini delve into the science behind touchscreens.

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