A colossal solar filament over twice the distance between Earth and the moon erupted from the Sun's northern hemisphere ...

The Chicago specimen is the smallest Archaeopteryx ever discovered, about the size of a pigeon. It was found in limestone ...

For centuries, scientists have observed that animals in warmer climates have longer limbs—a pattern known as Allen's Rule.

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

Airplane wings are modeled after bird wings. The bones and muscles of the wing are also highly specialized. The main bone, the humerus, which is similar to the upper arm of a mammal, is hollow ...

Most modern birds solved this issue by evolving shorter appendages to accompany their tertial feathers. But even though ...

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

Scans of the Chicago Archaeopteryx show feather and bone features that worked together to create lift.

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 ...