How It Works-Book Of Dinosaurs

Flowers like

magnolias grew

Elasmotherium

Forests, grass and

Eryops woodlands grew

Stegosaurus

Triceratops

Velociraptor

Hainosaurus

Kronosaurus

Saber-toothed cat

Halitherium

DID YOU KNOW? (^) Lots of dinosaurs couldn’t survive the 60°C heat of the Triassic period
299 to 250 million years ago
It was extremely hot during this
time. While there were oceans, the
land was very much like a desert.
Only reptiles would be able to thrive
in this environment
Permian period
145 to 66 million years ago
Sea levels were high during the warm
Cretaceous period. Dinosaurs ruled the
land, while other types of creatures
swam the seas
Cretaceous period
66 to 2.5 million years ago
The dinosaurs had been killed by a
great asteroid by this time. In their
place, other animals like the
saber-toothed cat lived
Tertiary
(^7) Sharks
Sharks were common in the seas
(^9) Mammals
The Tertiary period was called the ‘Age
of the Mammals’
(^1) High temperatures
It might have been very hot, but some
places had rain
(^2) The fi rst dinosaurs
Staurikosaurus is one of the very fi rst
known dinosaurs
(^8) Cooling down
The Cretaceous period was cooler than
earlier periods
(^6) T-rex
Tyrannosaurus rex lived during the
Cretaceous period
(^5) Predators
Very large land predators like
Allosaurus preyed on other animals
(^10) Palm trees
Palm trees grew as far north as
Greenland before the middle and end of
the Tertiary period
(^4) Continents
Around the world, land moved to make
more coastlines
(^3) Flora
Lush jungles covered much of the land
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