Amphibians: History of Life on Earth Life originating in the oceans colonizes the land.
Complex life forms evolved and thrived
in the oceans and shallow seas
over 600 million years ago.
600,000,000 However years ago . . .
No plants were growing on the land.
No animals were moving about.
About 500 million years ago,
primitive plant life
began to grow
close to shore
creating new habitats
for other living things.
scorpions!
the very FIRST ANIMALS
to survive on land were . . . About 440 million years ago
Other ARTHROPODS
soon followed -
centipedes and millipedes Arthropods?
scorpions
lobsters
crabs
spiders
mites
insects
centipedes
millipedes
Creepy crawlies - everywhere!
Scorpions and Other Arthropods Escape to Land
History of Life on Earth
AFTER
the scorpions
first walked on land 40 million years
and FEET
to plow through
thick plant growth developed LUNGS
to survive the low oxygen
in the water Fish living in swampy wetlands
AMPHIBIANS!
These flat-footed,
air-breathing "fish"
were evolving into . . . 4 legged animals escape to land
Breathing air and walking on four legs Amphibians --
the first vertebrates
to leave their water world
to live on land
Carboniferous
The First Amphibians Dominate the Land
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The first VERTEBRATES to walk on land
Amphibians!
