Remember how Egyptian Muslims served has human shields for Egyptian Christians during this year's Coptic Christmas Mass? Here's a photo of Egyptian Christians returning the favor, protecting praying Muslims during a protest this week. (Thanks, Brian Thomas!)
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.