What are the similarities and differences between the Chicken and the Tyrannosaurus Rex?
At first, scientists thought that dinosaurs were related to reptiles, but with research from bone and fossil material, they have formed a different view. In 2003, when scientists Jack Horner and Mary Schweitzer discovered unfossilised material inside the femur bone of a Tyrannosaurus Rex in Montana, America, they, and other zoologists and palaeontologists all over the world, documented that the Chicken and the Ostrich are living animals distantly related to the extinct theropod dinosaur Tyrannosaurus Rex (T-Rex). They said the next closest match is the Alligator.
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The Archaeopteryx (Archaeopteryx lithographica) is a small pterosaur, a cousin of the dinosaur, in the Archaeopterygidae family. Archaeopteryx means ancient wings.
Palaeontologists think it was the oldest known bird that was on the Earth. It lived in the Late Jurassic period around 150 million years ago in the land that it now called Europe.
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The skeleton of an African Rock Python (Python sebae) shows its triangular head, interlocking vertebrae), and rib bones.
Depending upon the species, pythons can have 150-400 vertebrae. Each vertebra is fused to a pair of rib bones. The rib bones are not connected to the tail vertebrae.
Pythons can grow to six metres (20 feet) long.
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Are there advantages in having a long neck in the animal kingdom?
Having long necks helps giraffes, camels, and llamas reach leaves and branches in tall trees that smaller herbivorous mammals cannot reach.
Almost all mammals have seven cervical vertebrae (bones) in their necks, whether they have long necks or short necks. Humans have seven neck bones too.
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