The Origin of Birds any other group of animals. This was at the time in opposition to the view of anatomist Sir Richard Owen of the British Museum, who viewed "Archaeopteryx" as no different taxonomically from modern birds. Huxley's work was controversial, and this climate of uncertainty and contention about bird origins persisted well into the beginning of the 20th century. While the dinosaur-bird connection (or lack thereof) was being pursued in paleontology, the problem of the evolution of flight was under scrutiny as well. It was observed that a number of animals with moderate flying or gliding ability, such as bats, flying lizards
Specimens of Archaeopteryx Tischlinger & Unwin (2004), who reclassified it as part of the sternum, albeit minimally ossified (mostly cartilagenous). This supports the idea that the Berlin "Archaeopteryx" was not a full-grown individual at the time of its death, and instead represents an immature animal. The pelvis of the Berlin specimen was considered by Dames to be markedly different from that of the London specimen, which was a major point in favor of his assigning a new species to the Berlin "Archaeopteryx", "siemensii", after its generous donor. Other researchers, however, disputed this difference, claiming it could be entirely accounted for by deformation of