Let's take a look at where some of the largest dinosaur fossils were discovered. 1. Patagotitan mayorum (Credit:schusterbauer.com/Shutterstock) Patagonia, Argentina 2012 — Weighing the equivalent of 10 African elephants, Patagotitan mayorum, the 70-ton Titanosaur, is believed to be the largest dinosaur ever to live.

Meanwhile, the longest dinosaur on record is likely Supersaurus, which lived about 150 million years ago in what is now the American West, and likely exceeded 128 feet (39 meters).

Argentinosaurus – long-heralded the Heaviest dinosaur – is known from only a small number of bones found in Argentina in the early 1990s.