Earliest Bird Had Feet Like Dinosaur, Fossil Shows
A 150-million-year-old fossil of Archaeopteryx, long considered the oldest bird, may put to rest any scientific doubt that dinosaurs?specifically the group of two-legged meat-eaters known as theropods?gave rise to modern birds.
最古の鳥というより恐竜ではないかと。足の形状を詳しく調べた結果。