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 ...

There is one radius (R1) and one ulna (U1); these are the two bones that connect the wrist and elbow. There are two humerus bones (H1 and H2). The humerus connects the shoulder and the elbow.

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

The humerus bone unearthed in the 1990s dates back to between 103 million and 108 million years ago, and is the only fossil example of the extinct monotreme Kryoryctes cadburyi. The creature was ...

A controversial idea suggests the ancestors of echidnas were more like the platypus. For the first time, fossil evidence ...

As the world's only surviving egg-laying mammals, Australasia's platypus and four echidna species are among the most ...

Scientists have discovered 1.5-million-year-old standardized bone tools in Tanzania, pushing back the timeline of early ...