A new analysis of a pigeon-sized Archaeopteryx fossil in the collection of the Field Museum in Chicago is revealing an array ...

A Chicago fossil of Archaeopteryx uncovers unknown features, supporting theories of bird evolution from dinosaurs and ...

The creature could lay eggs on land, unlike amphibians. It was part of a large group known as “amniotes,” which would evolve ...

Key to the first bird’s flight was likely a set of never-before-seen feathers, called tertials, found on the upper arm of the ...

Ancient dinosaur fossil reveals secrets of the first bird flight, 150 million years ago The fossil, which had been in private hands before being acquired by the Field Museum in 2022, is the first ...

Archaeopteryx is the fossil that proved Darwin right. It's the oldest known fossil bird, and it helps show that all birds— ...

Based on what we know of living birds with long wings, the role of tertial feathers is primarily to close the wing gap and ...

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.