Crocodiles are not dinosaurs, although they both evolved from the same type of reptilian ancestors at about the same time. Crocodiles have changed very little over millions of years, because their body is vet well suited to their lifestyle and has not needed to evolve. Fossil forms range from tiny crocodiles of less than 1 m up to 16 m long giants. This is more than twice as long as any crocodiles still living today.
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