Since life originated on Earth (3770 Ma. Ago according to the latest evidence), evolution has left the mark of countless living organisms on the planet. Some evolved into new species while others disappeared due to a multitude of factors.
Since life originate on Earth (3770 ma.Ago according to the latest evidence),evolution has left the mark of countless living organisms on the planet.Some evolved into new species while others disappeared due to a multitude of factors,mainly environmental.Among the Dinosaurs.
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very good book on dinosaur species
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