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The most ancient group of animals, they live underwater, lack real tissues and body symmetry.
The animation shows the anatomy of turtles.
This prosimian is an excellent example for a species' evolution in geographical isolation.Lemur...
A transitional form between fish and tetrapods, or four-limbed vertebrates.
King of the savannahs, the lion is at top of its food chain. Its only enemy is man.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary link...
A prehistoric amphibian and an early representative of the Tetrapods, which became extinct 360...