Like a biologically gruesome version of those Russian nesting dolls, researchers found a fossil of a prehistoric shark that ate an amphibian, which in turn had just eaten a fish. All three were preserved in what's being described as one of the first "food-chain" fossils ever discovered, adding further proof to the fact that all those cutesy drawings of big fish eating little fish eating littler fish you saw in childhood had a cold-blooded real-life analogue.
These events happened 290 million years ago and were cemented in the bedrock of a long-dry river, but I'm planning to try and recreate them in my apartment with a mouse, my cat and Rosie O'Donnell.
Check out the original fossil at National Geographic.
Image Credit: National Geographic
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