This is the perfect opportunity to explain binomial nomenclature, since this is the way many dinosaurs are referred to and people always mess it up, especially with T. rex. If you ever notice, in science they use funny Greek and Latin names
that nobody understands to name organisms. The animal is referred to by
its genus and species. It is written like this:
"Genus species" or "G. species" for short.
Also, a subspecies name can be added:
"Genus species subspecies" or "G. s. subspecies" for short.
The genus name is capitalized, and the species (and subspecies) are left
lowercase. A period is used after the abbreviated genus and species
names when applicable. Genus, species, and subspecies names should be
italicized even when abbreviated. Though italicizing on the forums is a
pain since Ctrl+I doesn't seem to work, so it's probably better to
forget that. Anyway, the binomial nomenclature of T. rex is Tyrannosaurus rex
(the genus meaning "tyrant lizard" and the species meaning "king," thus
making "king of the tyrant lizards") and can be abbreviated as T. rex. Only T. rex is correct; T-Rex, T. Rex, T-rex, t. rex, and t-rex are all incorrect.
Here are some more examples (no dinosaur examples; don't know any of the top of my head):
American black bear = Ursus americanus -> U. americanus
eastern black bear = Ursus americanus americanus -> U. a. americanus
moose (elk in Europe) = Alces alces -> A. alces
Shiras moose = Alces alces shirasi -> A. a. shirasi
tiger = Panthera tigris -> P. tigris
Caspian tiger = Panthera tigris virgata -> P. t. virgata
You get the idea. Hopefully some of you will now get this right. I doubt it though.