An Introduction to Dinosaurs
Millions of years ago the earth was different. There were no
shopping malls, no apartments for rent
, no schools, no people even...but
there were all sorts of unusual animals and plants, many of which do
not exist any more.
Dinosaurs lived between 65 and 245 mya
(million years ago). This is known as the Mesozoic (mez-uh-zoh-ik) Era.
Many notable events took place during this time; apart from dinosaurs
appearing it was also when mammals, flowering plants and grass first appeared.
The Mesozoic is split into three distinct Periods: the Triassic (245 - 200
mya), the Jurassic (200 - 144 mya) and the Cretaceous (144 - 65 mya).
The names of these periods reflect the types of rock that were created
during them. What we know of dinosaurs is from fossils of their bones
that are preserved in these rocks. Though the fossil record is rare and
incomplete what it tells us is that the Dinosaurs were a
of creatures that ranged across the earth very successfully for a very
It's commonly held that the dinosaurs became extinct around
65 million years ago due to some cataclysmic event such as extreme
climate change caused by volcanic activity or a meteor strike - no one
knows for sure.
From the evidence gathered so far it is becoming clear
that birds are related to one
of the dinosaurs called Theropods,
a group of dinosaurs that mostly walked on two hind legs and ate meat.
It would seem that dinosaurs aren't extinct after all!