Although the exact number varies from model to model, smartphones contain about 80 percent of all the nonradioactive elements on the periodic table.

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Your smartphone is not making you dumber — digital tech can enhance our cognitive abilities

As we become increasingly reliant on smartphones, tablets and computers, conventional wisdom tells us that over-reliance on technology may take away from our ability to remember, pay attention and exercise self control, however, such fears that technology would supplant cognition may not be well founded.