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by krstl kitten
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Triassic, Jurassic, Cretaceous? What are
these? No, they are not sequels to movies, they are the
names of different periods of time in our Earth's
history. They are the times when great dinosaurs and
other fascinating creatures lived. At 46 years old, I'm
hardly a kid anymore, but in researching this article,
I'm beginning to see what my nieces and nephews find so
interesting about these animals.
I hope you do, too!
Let's begin with the Allosaurus, nicknamed the
"Different Lizard". Found on Earth during the
Jurassic period, the Allosaurus lived over 160 million
years ago!! I don't know about you, but I can't even
begin to imagine that many years. These animals were 35 to 40 feet
long with teeth that were 4 inches long and toenails in
serious need of a manicure at 6 inches long! Okay, so
dinosaurs don't have toenails, they have claws...a mere
technicality. They weighed anywhere from 2 tons to over 5
tons. In today's terms, that would be somewhere between
an elephant and an adult river hippo. More than 60
complete and partial Allosaurus skeletons have been
unearthed in the United States....more than any other
fossil.
The Coelophysis was a fast reptile from the Triassic
period. That makes him older than our buddy with the
toenail problem. His nickname was "Skinny
Bones", and he was all of about 50
to 60 pounds. At 9 to 10 feet long, I think we know where
he got his nickname! Built for speed, this dinosaur had
lots of sharp little teeth. He was also thought to be
cannibalistic. Okay, now that's just gross to me!
Couldn't they just make a salad or something? Anyway,
there were hundreds of Coelophysis skeletons found in
Ghost Ranch, New Mexico in 1947. They were all huddled
together, and scientists believe they died in a great
flood.
Speaking of floods, our next specimen was the first
amphibian. Nicknamed "Kool's Crocodile", the
Koolasuchus lived during the early part of the Cretaceous
period. This kool dude was able to walk on land, but he
preferred the water. He had a huge head and a very big
mouth. Hey! I'm not talking about your brother here! Stop
that giggling and pay attention, please. The Koolasuchus
was about 16 feet long. That's longer than a Volkswagen
Beetle. He had kind of a seafood diet, but he was known
to eat baby dinosaurs, too. Two fossils of Koolasuchus
jaw bones were found in Australia in 1989. Each bone was
over two feet long!!
Well, I don't know about you, but I'm looking forward to
learning more about the animals that roamed the earth and
skies millions of years ago. Take a look at
kids.discovery.com and see what other animals lived
during these three important times in history!
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