A Brief History of Geologic Time
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YouTubePBS Eons
A Brief History of Geologic Time
PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ↓ More info below ↓ By looking at the layers beneath our feet, geologists have been able to identify and describe crucial episodes in life’s history. These key events frame the chapters in the story of life on earth and the ...
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How Earth Was Formed
Le Carbonifère ressemblait à une autre planète. Il y a plus de 300 millions d’années, la Terre était recouverte d’immenses forêts marécageuses étouffantes, avec un taux d’oxygène bien plus élevé qu’aujourd’hui. C’est ce qui a permis à certaines créatures de devenir gigantesques. Des libellules de près de 70 cm volaient au-dessus des marais. Des mille-pattes géants de plus de 2 mètres rampaient entre les fougères. D’immenses scorpions se cachaient dans l’ombre pendant que les premiers reptiles co
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Le Carbonifère ressemblait à une autre planète. Il y a plus de 300 millions d’années, la Terre était recouverte d’immenses forêts marécageuses étouffantes, avec un taux d’oxygène bien plus élevé qu’aujourd’hui. C’est ce qui a permis à certaines créatures de devenir gigantesques. Des libellules de près de 70 cm volaient au-dessus des marais. Des mille-pattes géants de plus de 2 mètres rampaient entre les fougères. D’immenses scorpions se cachaient dans l’ombre pendant que les premiers reptiles co
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