I absolutely love this this new video from Engineer Guy Bill Hammack. Why? Because Hammack managed to make me intensely interested in something I'd previously never really thought twice about—the anodized aluminum coatings that cover—most famously—Apple products.
I sat down to watch this video expecting to be bored. By the end, I was captivated. What more can you ask for in an explainer?
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.