THE HISTORY OF LIFE ON EARTH

THE HISTORY OF LIFE ON EARTH

4 billion years ago
the Earth was formed

in millions of years
the first living beings appeared, adapting and changing with the environment

the scholars have divided this period into
5 ERAS lasting millions of years
different from each other for
the environment and forms of life

ARCAIC
the Earth forms
and the first forms of life in water are born

PRIMARY
vertebrates appear and life
on land: plants, amphibians and reptiles

SECONDARY
mammals and dinosaurs appear

TERTIARY
species appear
that take an upright position

QUATERNARY
the evolution of the genus Homo