Chim thy t Nhng c im cab st

C rng C ui di Ngn ca chi c vut

c im ca chim C lng v Xng chc nh

11/24/2011 1:47:43 PMNguyn Hu Tr153

Ha thch ca Archaeopteryx l bng chngcho thy im c trng nh c lng v v mc cu trc ging khng long. Archaeopteryx lcho thy c mi lin h quan trng gia khnglong v chim hin i ngy nay

11/24/2011 1:47:43 PMNguyn Hu Tr154

C rng v vut ging khng long, nhng c nhng cim ca chim. y l mu ha thch hon ho nht c tm thy trong lp Bavavian nc c nm1877.

Archaeopteryx

Hnh thnh kh nng bayGi thuyt chy