"Longipteryx is one of my favorite fossil birds, because it's just so weird— it has this long skull, and teeth only at the tip of its beak," says Jingmai O'Connor, associate curator of fossil ...

Sixty-six million years ago, an asteroid impact triggered the extinction of non-avian dinosaurs. Yet, some early birds, ...

Does a duck always look like a duck and quack like a duck? Sixty-six million years ago, at the end of the Cretaceous Period, ...