“Chicago Archaeopteryx” Unveiled: New Clues on Dinosaur–Bird Transition Revealed by Chinese–American Research Team
Archaeopteryx is one of the most famous fossil animals in the world. Its discovery shortly after the publication of Darwin’s On the Origin of Species offered strong support for the theory of evolution. For more than 160 years, this enigmatic “first bird” has fascinated scientists and the public alike. However, due to the limitations of preservation and technology, many mysteries about this ancient animal have remained locked in the Solnhofen limestone where they were found. The newly described Chicago specimen, acquired by the Field Museum in 2022, is the smallest known Archaeopteryx, roughly the size of a pigeon. It is nearly complete, with many bones preserved in relatively three dimensions, and includes rare traces of soft tissues such as skin, toe pads, and feathers—making it a landmark specimen in the study of early bird evolution.