The battle for the title of world's largest dinosaur is complicated.
Here's why: Paleontologists rarely discover an entire skeleton. They're more likely to uncover bone fragments and then try to estimate a profile of height and weight. Moreover, there are three categories for largest dinosaur on record: the weightiest, longest and tallest.
Starting with the weightiest, the gold-medal winner is likely Argentinosaurus. This supermassive titanosaur (a titanosaur is a giant sauropod, a long-necked and long-tailed herbivorous dinosaur) that lived about 100 million to 93 million years ago, during the Cretaceous period, in what is now (you guessed it) Argentina.
Read more here: LiveScience
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