“Sauropods were the largest land mammal.”
Where did you see that?
I didn't, just something stored in my mind full of mush. But I did look this up for you:
Titanosaurs: 8 of the World's Biggest Dinosaurs
What about the largest land animal? Today the elephant holds the title, but if we reach back into history, we can find even larger creatures. Many of the dinosaurs of the Mesozoic Era (about 252 million to 66 million years ago) were longer and more massive than modern elephants, hippopotamuses, and rhinoceroses. The largest dinosaurs of the era were the sauropods, a collection of four-legged herbivorous species that possessed long necks and tails.
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One of the largest titanosaurs, possibly the largest according to some sources, was Dreadnoughtus. It had a total length of roughly 26 meters (about 85 feet) and an estimated mass of 59 metric tons (about 65 tons). Dreadnoughtus is known from rock deposits of southern Patagonia, Argentina, that date to about 77 million years ago. There is only one known species, D. schrani.
The Rhinos referred to in this article stood more than 20 feet tall at the shoulder and weighed more than 20 tons. D. schrani @ 65 tons > Giant Rhino @ 20 tons. Seems like a simple inequality to me. What's to question?
Never trust Comcrap. Fake News all the time.