Tip:
Highlight text to annotate it
X
Now we have two unusual Dinos. First, the Iguanodon who was found in the early Cretaceous
Period, and that would have been perhaps a hundred and twenty to a hundred and ten million
years ago. Basically an American Dinosaur stood ten to fifteen feet tall, another one
that weighed five to ten tons. He actually liked to live in the swamps, could walk on
all fours, or climb trees and walk upright. Notice that on each thumb he has a very pronounced
protective claw. Again, for ripping, shredding vegetation and also for defending himself.
He was one of the first Dinosaurs actually identified. The name Iguanodon means Iguana
tooth, even though he's not actually related to the iguana. And again, his tail was off
the ground when he was moving. A friendly vegetarian who lived in herds. Another critter
right here is he Parasauralophus, which means beside ridged Dino, is what was called a Hadrosaur,
and they had many different characteristics. His is the most pronounced. And again this
is a creature that lived approximately sixty-five to seventy-five million years ago. Might have
encountered T-Rex, he was in the upper or late Cretaceous Period. And again probably
lived in herds and was a vegetarian. And could stand upright. The question is, with this
particular creature, what was that horn for? Was it just decorative, or was it possibly
serving another purpose? Well one idea was that it was a snorkel, and that he actually
entered the water. But in all analysis of the horns, which were about three feet in
length, very pronounced, they never found any opening so he would have drowned if he
went into the water. It was not a snorkel. However, they've found inner tubes that connect
to his nose and they think it actually helped him make sounds such as alerting other Dinos
to danger from a predator such as T-Rex. Or perhaps trying to communicate with them that
he's found food. But the horn did serve a purpose, but not as a snorkel. Yes. Parasauralophus
and the Iguanodon.