Ancient crocs ate dinosaurs

These crocs ate dinosaurs -- and in some cases actually walked more like a dog than a modern-day reptile.

One used an armored snout to ram prey; another lay in wait, its mouth open, before its jaws slammed shut on fish.

In new research published Thursday, University of Chicago dinosaur hunter Paul Sereno writes about five skeletons of ancient crocodiles that lived 100 million years ago.

"We have crocs that ate plants and galloped and ate dinosaurs and were flat as a board,'' said Sereno, who unearthed the skeletons over the last several years in the Sahara.

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