 "Archaeoraptor", described without peer review in a 1999 issue of "National Geographic", turned out to be a smuggled forgery, but legitimate remains continue to pour out of the Yixian, both legally and illegally.Feathers or "protofeathers" have been found on a wide variety of theropods in the Yixian, and the discoveries of extremely bird-like non-avian dinosaurs, as well as non-avian dinosaur-like primitive birds, have almost entirely closed the morphological gap between non-avian theropods and birds.There is a debate between embryologists and paleontologists whether the hands of theropod dinosaurs and birds are essentially different, based on phalangeal counts, a count of the number of phalanges (fingers) in the hand.