Birds or Baby Dinosaurs
Most paleontologists support the view that the birds have
been evolved from the group of Theropod Dinosaurs. The descendants of the birds
that survived the extinction which occurred 66 million years ago are continuing
the dinosaur lineage to the present day.
Dinosaurs are a group of animals that first appeared
during the Triassic period and were the dominant terrestrial vertebrates for
135 million years. The relationship among birds and dinosaurs was first pointed
out after the discovery of a primitive bird, Archaeopteryx in the nineteenth
century.
The birds and dinosaurs share a lot of features. More than
20 percent of fossils of dinosaurs found till date possess feathers. Even small
dinosaurs like Microraptor and Anchiornis, had wings. In 2009, Mr. Witmer, a
professor of anatomy concluded that these evidences are sufficient enough to
demonstrate that avian evolution went through a four winged stage.
The molecular comparison of cellular anatomy protein
sequencing of collagen tissue of Tyrannosaurus Rex also demonstrated that the
birds are closely related to the dinosaurs. Fossil evidences show that the
birds and dinosaurs share many other features like common nest building style,
common brooding behaviour, hollow pneumatized bones and gastroliths in the
digestive system. So just peek out of your window and see the much evolved
living dinosaurs outside.
Comments
Post a Comment