This week's Dear Science has resident smarties Jonathan Golob and Charles Mudede yabbering on about electricity. What's more dangerous: French fries or radio waves? Did you know that Thomas Edison invented the electric chair to demonstrate the perils of alternating currents? Another little-known fact: The United States of America is the oldest country on the planet. And hear how you can make a homemade X-ray just by sitting in an airplane.

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