with prehistoric man.
||Prehistoric man appeared over 60 million years
after the extinction of the dinosaurs.
were enormous animals.
||Some dinosaurs such as Procompsognathus and
Echinodon were about 2 to 3 feet long.
||Dinosaurs developed into a great range of over
400 species during the Mesozoic.
A period of time lasting 186 million years! Current
research, however, lends strong support to the
idea that bird are living descendants of the dinosaurs.
|All large Mesozoic
age reptiles were dinosaurs.
||Large reptiles such as Dimetrodon (sailback),
Pteranodon (flying reptile), and Megalneusaurus
(marine reptile) were not dinosaurs.
came from eggs.
||It is a good guess that most dinosaurs came
from eggs. Only two hadrosaurids,
a Troodon, an oviraptorid,
and a velociraptid have identifiable fossil evidence
showing they came from eggs.