Siats meekerorum WAS BIGGER THAN THE T REX

Before T. rex, This dinosaur was king: Researchers have discovered another top dino that lived before Tyrannosaurus rex. About 98 million years ago — 31 million years before tyrannosaurs — there was Siats meekerorum, whose bones were found in Utah. The onetime top predator walked on two legs and may have weighed four tons.