When T. rex closed its jaws, the force was unlike anything alive today. Scientists figure it could crunch down with about 12,800 pounds of pressure - roughly six tons. For comparison, a great white shark bites at about 1,600 pounds, and a lion at about 650.
The teeth weren’t sharp blades like a velociraptor’s. They were thick, banana-sized cones built to grip and crush. T. rex didn’t just bite - it bit, twisted, and shattered bone, then swallowed huge chunks whole.
We know this from coprolites - fossilized poop. A T. rex coprolite the size of a watermelon was found full of pulverized bone, proof that this monster wasn’t picky. If a leg, ribs, or horns got in the way, it ground them up too.