Scans of the most well-preserved fossil of a prehistoric flying reptile with intact feathers have revealed how the first birds managed to fly while their non-bird dinosaur cousins could not. The ...

LOS ANGELES — A teenager in Argentina has discovered the fossil skull of the biggest bird ever found — a swift, flightless predator 10 feet tall that pursued its prey across the steppes of Patagonia ...

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(Reuters) -A new analysis of a pigeon-sized Archaeopteryx fossil in the collection of the Field Museum in Chicago is revealing an array of previously unknown features of the earliest-known bird, ...

Scientists with the Field Museum of Chicago have discovered that a pigeon-sized Archaeopteryx fossil in its collection displays an array of features previously unknown when it comes to the earliest ...

This is a fossil skull of the terror bird Andalgalornis, compared with the skull of a modern-day golden eagle and a human skull for scale. Andalgalornis was an extinct, 4.5-feet-tall, flightless ...

But in the thousands of fossil birds in the same group as this little fossil, none have ever been found with gizzard stones. To help determine if the new little bird was simply the first of its kind ...

(CNN) — When a fossil preserves an animal’s complete body in a death pose, seeing it is observing a snapshot in time. Several such fossils exist for Archaeopteryx — the earliest known bird — and now, ...