Tyrannosaurus rex (1905)

Tyrannosaurus rex stands as the undisputed apex predator of the dinosaur age, with bite forces exceeding 8,000 pounds—three times stronger than the runner-up, Carcharodontosaurus. Henry Fairfield Osborn named this "tyrant lizard king" from Hell Creek fossils in 1905, igniting a century-long debate between hunter and scavenger theories. Over 50 T. rex specimens have been unearthed, none larger than "Sue" at 42 feet long, cementing its status as the heaviest predatory dinosaur. Its robust femur and shock-absorbing teeth outperform #2's more fragile build, allowing it to crush even Triceratops horns. New CT scans reveal air sacs and a massive olfactory bulb, suggesting it could track live prey across 10-mile distances, outweighing #3's evidence for scavenging by 40%.