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origin and evolution of species click to hear : origin and evolution of species

Since its formation some 4.6 billion years ago, the Earth has witnessed the genesis of continents and oceans and the appearance of animals and vegetation.
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See origin and evolution of species in : french | spanish
Permian mesosaur dimetrodon Jurassic ichthyosaur archaeopteryx plateosaur Triassic nothosaur coelophysis megazostrodon

Permian click to hear : Permian

Geological period marked by the predominance of reptiles and amphibians. The continental mass now formed into a great protocontinent: Pangea.

mesosaur click to hear : mesosaur

First aquatic reptile with long sharp teeth and a powerful tail allowing it to propel itself in shallow water.

dimetrodon click to hear : dimetrodon

Carnivorous reptile fossil with dorsal spines connected by a membrane to regulate its internal temperature; dominant in the Permian period.

Jurassic click to hear : Jurassic

Geological period during which the dinosaurs ruled the world. The Atlantic Ocean was formed at this time.

ichthyosaur click to hear : ichthyosaur

Swift carnivorous marine reptile; it had certain dolphin characteristics and reached 10 meters in length. It disappeared during the Cretaceous period.

archaeopteryx click to hear : archaeopteryx

Animal fossil capable of flight; it had certain characteristics of a reptile (claws, teeth, long bony tail) and others of a bird (wings, feathers).

plateosaur click to hear : plateosaur

One of the largest dinosaurs of the Jurassic period. This long-necked herbivore stood upright on its hind legs to reach the leaves of trees.

Triassic click to hear : Triassic

Geological period marked by the breaking apart of the great protocontinent, the formation of today’s continents and the appearance of mammals.

nothosaur click to hear : nothosaur

Carnivorous amphibious dinosaur fossil with short finlike limbs adapted to move on land and in the water.

coelophysis click to hear : coelophysis

Two-legged carnivorous dinosaur, extremely agile and fleet of foot, with powerful claws.

megazostrodon click to hear : megazostrodon

About the size of a mouse, one of the first mammals to appear on Earth was a mainly nocturnal insectivore.