What ate the t-rex?

Answer 1

T-rex had no natural predators, and only 3 dinosaurs out of every kind that lived could have a chance of defeating t-rex. These include Triceratops, ankylosaurus, Brachiosaurs(+which lived in the Jurassic period not cretacious). Not Spinosaurs, inspite of the famous Jurassic Park 3. So unless a t-rex died of natural causes nothing would be dining on Tyrannosaurus Rex.

Answer 2

Possibly, yes. There is some evidence that T rex. sometimes ate their own kind.

Answer 3

all of them except the teradactle