MAMMALS SPREAD

MAMMALS SPREAD
65 million years ago

Tertiary era

THE FIRST SMALL MAMMALS

appear at the time of the dinosaurs

 TO SURVIVE

they are active at night

WHY?

 IN THE ARCHAIC ERA

there is a climate change

the dinosaurs go extinct

WHERE?

in the sea, in the sky, on land

CHARACTERISTICS

they resist the cold

 BECAUSE

they have warm blood

 SO

body temperature is equal to or higher than the environment

they give birth and
take care of
the young

this is their strategy to avoid extinction

this activity stimulates intelligence