We first encounter Dumbledore's mysterious "Put-Outer" early on in Harry Potter and the Sorcerer's Stone, when he knocks out an entire street's lights with just a few clicks. "It seemed to be a silver ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Supriya Chakrabarti, Professor of Physics, University ...

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Perhaps you remember the opening scene of “Harry Potter and the Sorcerer’s Stone” that took place on Privet Drive. A bearded man pulled a mysterious device, called a deluminator, from his dark robe ...