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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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Basic Information |
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