The Chicago Archaeopteryx features more soft tissue and delicate skeletal details than any known fossil of its kind, and ...

Ornithopters, aircraft that fly by flapping their wings like birds, have long been a staple of science fiction, most famously in Dune. But what if one actually existed? In the 1930s, French engineer ...

A Chicago fossil of Archaeopteryx uncovers unknown features, supporting theories of bird evolution from dinosaurs and highlighting its unique flight adaptations.

Entomologists have discovered Papilio solstitius, a new tiger swallowtail butterfly that appears in summer in eastern North ...