THE GLACIATIONS

THE GLACIATIONS
between 23 and 2 million years ago

TERTIARY ERA

 and

QUATERNARY ERA

 are

periods of intense cold, alternating with milder periods

the ice covers much of the emerged lands

have modified

the distribution of animal and plant life

the shapes of the reliefs

 through

the erosive action of glaciers

the bodies of animals

 in fact

to survive
the cold they developed

thick fur

fat reserves