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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