"Matryoshka" fossil

Forty-eight million years ago, a snake ate a lizard with a bug in its belly, and all three fossilized... That fossil, recently described in Palaeobiodiversity and Palaeoenvironments, is only the second of its kind ever found, revealing three levels of an ancient food chain nested one inside the other in paleontology’s version of Russian nesting dolls—or its culinary equivalent, a turducken. Details (and explanation of the image) at National Geographic.