Imagine a bird that has clawed wings, and appears to be a living link to the age of dinosaurs. Meet the hoatzin, the stinkbird of the Amazon rainforest.

The bones of a 160-million-year-old dinosaur are helping scientists solve one of evolution’s biggest mysteries: how birds ...

“The pisiform, in living birds, is an unusual wrist bone in that it initially forms within a muscle tendon, as do bones like your kneecap — but it comes to occupy the position of a ‘normal’ wrist bone ...

However, the fossil really stands out because, in a rare stroke of luck for paleontologists, its bony vocal organs were ...