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Why are smartphones so hard to put down?

Brains On! Science podcast for kids

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Why Are Blurred Bruises Purple and Blue?

Julia from New York asks why bruises are purple and blue. Shearer Rosenberg explains how blood travels through the body in tubes called capillaries. Parents can cut back on screen time by turning off notifications or charging your phone away from your bedroom. Brains On is supported by you, so go to brainson.org slash donate to do your part.

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