The humerus is your upper arm bone. It is the longest bone in the upper part of your body and is connected to many important tendons and ligaments. The top of the humerus is part of the shoulder ...

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

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

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

New analysis of a 100-million-year-old fossil embedded in a rocky cove in Australia suggests echidnas may have evolved from ...

The humerus bone—which is the upper arm bone between the shoulder and elbow—is the only bone known that belongs to the extinct species, Kryoryctes cadburyi, named in 2005. Outwardly ...

New fossil evidence suggests echidnas evolved from a water-dwelling ancestor, not a land-based one. The bone structure ...

The fossil, a humerus, or upper arm bone, was discovered in 1993 at Dinosaur Cove in southeastern Australia. From the outside, the specimen looked more like a bone from a land-dwelling echidna ...