A coordinated group of Mapusaurus would gather for a rare and dangerous opportunity, converging on the nesting grounds of Argentinosaurus around 94.5 million years ago in what is now Argentina. These sites attracted the largest land animals ever to walk the Earth and with them, immense risk and reward. While a single predator stood no chance against an adult Argentinosaurus, teamwork may have allowed Mapusaurus to harass, exhaust, or isolate vulnerable individuals, such as juveniles or weakened

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