Sauroposeidon
The press release in 1999 immediately garnered international media attention, which led to many (inaccurate) news reports of "the largest dinosaur ever!". While "Sauroposeidon" likely represents the tallest known dinosaur taxon, it does not hold records for either the longest or most massive. "Patagotitan" or "Argentinosaurus" make better candidates for the title "World's Largest Dinosaur" (presuming to ignore, as is conventional, "Amphicoelias"), though incomplete fossil evidence makes exact rankings impossible.
Plaza Huincul
The Argentinosaurus is the largest dinosaur to walk on earth and it was discovered in Plaza Huincul by Guillermo Heredia. It is estimated that it lived on Earth 94-97 million years ago. The Argentinosaurus has a height of 35 meters and Paleontologists have estimated that it may have weighed as much as 75 to 100 tonnes. The Argentinosaurus was discovered in 1987 by a rancher who mistook the legbone of a dinosaurs for petrified wood