Add Yahoo as a preferred source to see more of our stories on Google. A massive, fanged creature with a head shaped like a toilet seat lurked in swamps near the edge of the world 280 million years ago ...

Its skull was more than 2 feet (0.6 meters) long, and researchers estimate the entire animal could have been to 8.2 feet (2.5 m) long, potentially making it the biggest creature of its kind, according ...

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(CNN) — A massive, fanged creature with a head shaped like a toilet seat lurked in swamps near the edge of the world 280 million years ago, long before the first dinosaurs appeared, new research has ...