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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