This theory, first suggested by the discovery of the “missing link” Archaeopteryx in 1861 (technically 1855), has been most spectacularly illustrated by the recent discovery of feathered dinosaurs, most famously in Liaoning province, China. Yet the most compelling evidence still comes from a complete anatomical study of both groups. Birds share hundreds of anatomical features with other dinosaurs unique to the various dinosaurian clades they belong to, and also many behavioral similarities inferred from fossils.