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Millionsofyearsago,longbeforetherewereanypeople,thereweredinosaurs.Dinosaurslivedontheearthforover165millionyearsbutthentheymysteriouslybecameextinct.Therewerelotsofdifferentkindsofdinosaursthatlivedatdifferenttimes.SomewereHUGE………andsomeweremuchsmaller.Somedinosaurscouldmovealongquitequicklyontwolegs.Otherswalkedonfourlegsinaveryslowandclumsyfashion.Differentdinosaurslikedtoeatdifferentthings.Dinosaurslikethediplodocuslikedtoeatleaves:thesedinosaursarecalledherbivores.Dinosaurslikethevelociraptor,ortheT-Rex,likedtoeatmeat:thesedinosaursarecalledcarnivores.Allofthedinosaurslookedquitedifferent.Theycouldhave……armourplating,…horns,…bumpyskinor…wings.Therewerelotsofotherdifferencestoo!Nobodyknowsexactlywhathappenedtothedinosaurs.Somepeoplebelievethatanasteroidcausedchangesontheearththatthedinosaurscouldnotadaptto.Allthatisleftofthedinosaursarefossils.Thesearedinosaurbonesthathavebeendiscoveredintheearthandrock.Imagesavailablefrom