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Imagine when human beings lived side by side these massive dinosaurs in the past. We could have been wiped out first before they would. Nature definitely has its way to find order and balance in this world. Nevertheless, the dinosaurs still remain as the largest creatures to have walked the Earth as far as we know. Let us take a look at 13 of the largest dinosaurs that would leave you in awe, or fearful if they were standing right in front of you.