Ember the platypus has no stomach. But there's nothing wrong with her. No platypuses have stomachs. They're just one of a surprising number of vertebrate species that have evolutionarily jettisoned their stomachs, in favor of a straight-shot digestive tract that directly connects the throat to the intestines.
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.