History of the Universe

   

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Biological Environment > Spread of mammals

Earth Earlier Earlier  50 Million Years ago Later Earth After Animals Later

This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand.

 
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Mammals could keep themselves warm. Perhaps that is why they survived the meteorite. They evolved quickly, filling most life-styles left empty by the dinosaurs.

Most mammal families we know today had appeared by 50 million years ago. Whales spread in the oceans while hoofed plant-eating animals, the horse family, became common on land and evolved into giants. Meat-eating and flying mammals also appeared at this time.

   
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Earth Earlier Earlier  50 Million Years ago Later Earth After Animals Later

Biological Environment > Spread of mammals

   

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