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hunting packs

Tyrannosaurus Rex Likely Hunted in Packs - and There Were Billions of Them!

Tyrannosaurus Rex Likely Hunted in Packs - and There Were Billions of Them!

As the most ferocious dinosaur, Tyrannosaurus rex once prowled the lands that now comprise North America with impunity. And if the conclusions of a new research project are correct, their behavior...