In 1902, famed fossil hunter Barnum Brown was prospecting in Montana when he discovered the first documented remains of a Tyrannosaurus rex. The creature was nearly 40 feet long with banana-sized teeth, warranting its name, “king of the tyrant lizards.” Finds since then have only reinforced T. rex’s status as one of the planet’s most ferocious predators ever. We now know that — in a world of large plant-eaters — these hunters didn’t just rely on their enormous size, they had keen senses and