The smallest types were about the same size as a
chicken, and the largest were over 100 feet (30 meters) long.
Different dinosaurs ate different
Some types of dinosaurs ate only meat ("carnivores"), some ate only
plants ("herbivores"), and some ate both plants and meats
Many people incorrectly assume that all the dinosaurs lived together at
the same time. This was not the case. The dinosaurs lived during a period known as
the Mesozoic Era
which lasted many millions of years. During that time, new types of dinosaurs
evolved, and other types went extinct. In fact, in terms of distance in time,
we are closer to some of the later types of dinosaurs such as
than they are to some of the mid-period, and relatively early types of dinosaurs such as
was very different at the time of the dinosaurs, however the dinosaurs were
around for such a long time that the world changed considerably over this period:
At the time of the earliest dinosaurs,
the Triassic period,
all the Earth's continents were joined together in one super-continent, called Pangaea.
During the final period of the dinosaurs, known as the
the Cretaceous period,
just before the
dinosaurs become extinct,
the super-continent had broken up, and the different parts had begun to drift apart
into something starting to resemble the modern globe.
Of course, during this entire period,
different regions had different climates and ecology, and so different types of animals
(including different types of dinosaurs) were found in the various parts of the world.
Just like modern animals, the different types of dinosaurs were
related to each other. Biologists use the terms "order",
"family", "genus" and "species" to
and to indicate
how closely different types of animals are related.
A dinosaur which is the same species as another dinosaur is of the exact same
type, whereas two dinosaurs which are of the same genus are closely related
but of different types, and two dinosaurs of the same family are a bit
more distantly related and so on.
The chart below shows some of the different types of dinosaurs (divided into
herbivores, carnivores and omnivores). In most cases, the chart shows a genus or
family of dinosaur, although in some cases a single species may be indicated.
Please select any one of these dinosaurs, if you would like to find out more informaiton
about that particular type of dinosaur:
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