Scientists have unearthed in northwestern Argentina fossils of the earliest-known giant dinosaur, a four-legged plant-eater with a medium-length neck and long tail that was a forerunner of the largest land animals of all time.
Scientists have unearthed in northwestern Argentina fossils of the earliest-known giant dinosaur, a four-legged plant-eater with a medium-length neck and long tail that was a forerunner of the largest land animals of all time.