Gigantic flightless bird lived on the Arctic 50 million years ago

Researchers from the Chinese Academy of Sciences in Beijing and the University of Colorado Boulder have found fossil evidence that suggests that a giant, flightless bird known as Gastornis wandered in the Arctic winter some 53 million years ago. The evidence is a single fossil toe bone of the 6-foot tall, several-hundred-pound bird from Ellesmere Island above the Arctic Circle.