I've read that Tyrannosaurus Rex was the last dinosaur to become extinct. Others claim it was the herbivore Triceratops, but T.Rex seems to be the one mentioned most often in this context. The question then arises: what did the last T.Rex eat? Did T. Rex and Triceratops go out together?

Sure, extinction may have taken a long time, and the fossil evidence of what happened may be spotty and hidden, and therefore inconclusive or misleading. But in general we can still safely say that one of the last big dinosaur carnivores to disappear was T. Rex, so it was probably one of the last dinosaurs to survive. But what did a huge meat eater like that feed on as really big game (or carrion) became scarcer and scarer in the late Cretaceous? The bones of its prey should be just as common as those of T. Rex itself, right up to the end..

It may be tempting to say that T. Rex somehow made it through the late Cretaceous Event that killed off all the other dinosaurs, and that the tyrant lizard lived a few months longer by feasting on the carcasses of the dead and a few other weakened survivors, and by cannibalizing its fellows . But those "few months" would look like a sharp delineated line in the fossil record. The fact remains, alpha predators are precariously perched at the top of the food chain, they tend to be the first to go when major changes occur in the environment, not the last.

Come to think of it, that is a lesson we should consider ourselves, very carefully.