Spinosaurus was a dinosaur that walked on two legs with three toed feet. They had two arms, each presumably with four fingers. Spinosaurus had a long, narrow head with non-serrated, interlocking teeth that were perfect for catching fish. To picture its head, imagine the head of a crocodile with a small crest over each eye. Spinosaurus was 49 feet long. The defining feature, however, was its many long, narrow spines that extended vertically from its back, and these spines were covered in skin, creating a large, semi-circular "sail" on its back. Some suggest, however, that rather than supporting a "sail," the spines supported a large hump.
It is bigger than t-rex.
Dens are unique to the axis.
Aristides identified Christianity as the unique feature of the Roman Empire.
A unique feature is that it has many tall towers with curving sides that taper at the top.
They are unique by being unique.
8=D
No idea! Srry ;
ungas
A unique land feature is the space needle
spinosaurus
Spinosaurus.
Their poly symmetric structure
It connects stuff.