Eighty million years ago,
back in the late Cretaceous,
lived the great Tyrannosaur,
a fearsome and predacious
therapod of monstrous size!
He weighed six tons or more!
He epitomized the concept of killer carnivore!

His jaws had teeth like railroad spikes,
with fore and aft serrations!
This dental hardware was designed
for quick eviscerations!
With thrashing bites and awful roars
the T. Rex would attack!
He was, it's clear, a savage
Mesozoic maniac!