This illustration provided by the Smithsonian Institution on March 18, 2014 shows the dinosaur Anzu wyliei. The birdlike animal, about 7 feet tall, weighed an estimated 500 pounds when it roamed ... more 
This illustration provided by the Smithsonian Institution on March 18, 2014 shows the dinosaur Anzu wyliei. The birdlike animal, about 7 feet tall, weighed an estimated 500 pounds when it roamed western North America around 66-68 million years ago. Nicknamed the "chicken from hell," the creature was formally introduced with an official name to the scientific community Wednesday, March 19, 2104 as scientists published a description and analysis of its anatomy. (AP Photo/Bob Walters) less 
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Associated Press | Photo By Bob Walters
Wed, Mar 19, 2014 5:00 PM EDT